Am-241_tables
241
95Am146
1Decay Scheme
Am-241decays100%by alpha transitions to Np-237.Most of the decay(84.6%)populate the excited level of Np-237with energy of59.54keV.Branching of Am-241decay by spontaneous?ssion is3,6(9) E-10%.
L’am′e ricium241se d′e sint`e gre`a100%par′e mission alpha vers le neptunium237.Le branchement principal (84,6%)se fait vers le niveau excit′e de59keV.Un faible branchement(3,6(9)E-10%)par?ssion spontan′e e a′e t′e observ′e.
2Nuclear Data
T1/2(241Am):432,6(6)a
T1/2(237Np):2,144(7)106a
Qα(241Am):5637,82(12)keV
2.1αTransitions
Energy Probability F
keV×100
α0,364838,00(13)0,00004(3)47
α0,344882,14(13)0,00008644
α0,334915,86(13)0,00079,5
α0,324971,62(15)
α0,305039,83(15)
α0,295045,49(14)
α0,285047,73(13)
α0,275091,70(14)0,00011000
α0,255140,81(13)
α0,245151,60(15)0,000112300
α0,235178,13(13)～0,0004～1000
α0,225185,27(13)～0,0004～1000
α0,215193,04(16)
α0,205203,70(13)0,00041400
Energy Probability F
keV×100
α0,195219,6(2)
α0,185242,25(13)0,00071400
α0,175266,89(13)0,00034600
α0,165269,21(13)0,00091600
α0,155277,90(23)0,00062700
α0,145305,44(13)
α0,135313,40(13)0,00132100
α0,125321,0(3)
α0,115332,77(13)0,0022(3)1600
α0,95370,25(13)0,000512000
α0,85411,82(13)0,014(3)770
α0,65479,32(13)1,66(3)16,4
α0,55507,83(13)～0,01≈4000
α0,45534,86(12)13,23(10)4,3
α0,35561,92(12)<0,04>2000
α0,25578,28(12)84,45(10)1,3
α0,15604,62(12)0,23(1)600
α0,05637,82(12)0,38(1)610
2.2Gamma Transitions and Internal Conversion Coe?cients
Energy Pγ+ce MultipolarityαKαLαMαT
keV×100
γ10,9(Np)13,81(2)M1+0,10%E2365(7)494(10)γ2,1(Np)26,34460(24)21(5)E1anomalous6(2)1,6(2)8(2)γ4,3(Np)27,06(1)
γ27,26(Np)31,92(8)
γ(?1,1)(Np)32,1830,0174(4)
γ1,0(Np)33,1963(3)21,3(30)M1+1,66%E2131(17)33(5)175(24)γ17,14(Np)38,54(3)M1+>30%E2>94>345>472
γ3,1(Np)42,704(5)≈0,42(9)(M1+≈1,7%E2)≈56(5)≈13,9(14)≈75(7)γ4,2(Np)43,420(3)12,1(16)M1+16,6%E2132(17)35(5)180(23)γ14,10(Np)51,01(3)0,000046(21)E10,564(11)0,141(3)0,753(11)γ5,3(Np)54,09(3)
γ6,4(Np)55,56(2)1,19(16)M1+17,5%E248(4)12,6(11)65(6)γ13,9(Np)56,86(3)
γ(?1,2)(Np)57,85(5)
γ2,0(Np)59,5409(1)77,6(25)E1anomalous0,84(6)0,226(7)1,16(7)γ7,5(Np)61,56(7)
γ14,9(Np)64,83(2)0,000196(28)E10,301(6)0,0744(15)0,400(8)γ8,6(Np)67,50(2)0,013(4)(M1+17%E2)22(5)5,7(13)29(6)γ4,1(Np)69,76(3)0,0039(5)(E1)0,248(5)0,0612(12)0,330(7)γ3,0(Np)75,90(1)0,032(E2)38,6(8)10,76(22)53,1(11)γ36,33(Np)77,86(4)
γ11,8(Np)79,05(3)
γ15,9(Np)92,35(20)
γ5,1(Np)96,79(3)0,000047(16)
γ6,2(Np)98,97(2)0,329(10)E211,07(22)3,08(6)15,2(3)
keV×100
γ4,0(Np)102,98(2)0,0218(5)E10,0895(18)0,0219(4)0,1189(24)γ(?1,3)(Np)106,42(5)
γ20,13(Np)109,70(7)0,000051[E2]6,86(14)1,91(4)9,44(19)γ7,3(Np)115,65(6)
γ21,13(Np)120,36(8)
γ8,4(Np)123,05(1)0,00675(30)E20,184(4)4,05(8)1,127(23)5,75(12)γ6,1(Np)125,30(2)0,00533(26)(E1)0,228(5)0,0538(11)0,0132(3)0,299(6)γ(?1,4)(Np)128,05
γ20,11(Np)129,07(6)
γ23,13(Np)135,27(4)
γ(?1,5)(Np)136,7
γ30,23(Np)138,30(9)
γ29,22(Np)139,44(8)0,000023(5)[E2]0,211(4)2,29(5)0,638(13)3,37(7)γ11,6(Np)146,55(3)0,00172(5)E20,210(4)1,83(4)0,51(1)2,73(6)γ8,3(Np)150,04(3)0,000087(6)[E1]0,152(3)0,0339(7)0,00827(17)0,197(4)γ26,15(Np)154,27(20)0,000004[M1]5,59(11)1,108(22)0,269(6)7,06(14)γ(?1,6)(Np)156,4(3)
γ29,20(Np)159,26(20)0,0000016(6)[E1]0,132(3)0,0292(6)0,00711(14)0,171(4)γ24,13(Np)161,54(10)0,000011[M1]4,91(10)0,971(19)0,236(5)6,20(12)γ9,4(Np)164,61(2)0,000178(9)E20,195(4)1,095(22)0,304(6)1,70(4)γ13,6(Np)165,81(6)0,00011(5)[M1+E2]2,4(22)0,98(8)0,26(4)3,7(22)γ18,8(Np)169,56(3)0,000427(26)E20,189(4)0,961(19)0,267(6)1,51(3)γ11,5(Np)175,07(4)0,000021(3)[E1]0,1066(21)0,0230(5)0,00560(11)0,137(3)γ(?1,7)(Np)190,4
γ25,11(Np)191,96(4)0,0000415(20)[E2]0,162(3)0,561(11)0,155(3)0,932(19)γ29,18(Np)196,76(8)0,00000054[E1]0,0816(16)0,0172(4)0,00418(9)0,1045(21)γ(?1,8)(Np)201,70(14)0,0000008
γ18,7(Np)204,06(6)0,00000226(7)[E1]0,0752(15)0,0157(3)0,00382(8)0,0960(19)γ9,2(Np)208,005(23)0,00313(6)M1+2,38%E22,35(5)0,473(9)0,1149(23)2,98(6)γ13,4(Np)221,46(3)0,00011(5)[M1+E2]1,1(10)0,35(5)0,090(7)1,5(10)γ26,10(Np)232,81(5)0,0000155(4)[M1]1,76(4)0,345(7)0,0837(17)2,22(5)γ9,1(Np)234,40(4)0,0000080(8)M25,60(11)1,95(4)0,511(10)8,24(17)γ26,9(Np)246,73(10)0,00000703(22)[M1]1,49(3)0,294(6)0,0711(14)1,88(4)γ13,3(Np)248,52(3)0,00000155(3)[E1]0,0482(10)0,00975(20)0,00236(5)0,0612(12)γ24,8(Np)260,22(9)
γ22,7(Np)261,00(7)0,00000169(8)[E2]0,0979(20)0,156(3)0,0428(9)0,312(6)γ27,10(Np)264,76(7)
γ13,2(Np)264,88(3)0,000018(7)[M1+E2]0,7(6)0,19(5)0,049(9)0,9(7)γ9,0(Np)267,54(4)0,000055(2)E1+19,4%M20,74(4)0,238(12)0,062(2)1,06(6)γ(?1,9)(Np)270,63(15)
γ(?1,10)(Np)271,54
γ20,6(Np)275,77(8)0,000011(4)[M1+E2]0,6(5)0,17(5)0,043(9)0,8(6)γ27,9(Np)278,04(15)0,00000270(8)[M1]1,072(21)0,210(4)0,0509(10)1,35(3)γ13,1(Np)291,3(2)0,00000318(8)[E1]0,0341(7)0,00671(14)0,00162(3)0,0430(9)γ16,3(Np)292,77(6)0,0000173(4)[E2]0,0796(16)0,0991(20)0,0270(6)0,215(4)γ15,2(Np)300,13(6)
γ20,5(Np)304,21(20)0,000000966(21)[E1]0,0310(6)0,00607(12)0,00147(3)0,0391(8)γ16,2(Np)309,1(3)0,00000210(31)[E1]0,0300(6)0,00585(12)0,00142(3)0,0377(8)γ12,0(Np)316,8(2)
γ28,9(Np)322,52(4)
γ22,5(Np)322,56(3)0,000257(7)(M1+26,5%E2)0,541(8)0,1204(17)0,0297(5)0,702(12)γ(?1,11)(Np)324,690,0000018(3)
γ(?1,12)(Np)329,690,0000011(2)
γ14,0(Np)332,35(3)0,000172(5)E20,0631(13)0,0611(12)0,0165(4)0,147(3)γ16,1(Np)335,37(3)0,00084(4)M1+17,3%E20,54(7)0,113(8)0,0278(10)0,69(8)γ17,1(Np)337,7(2)0,00000556(10)(E2)0,0612(12)0,0575(11)0,0156(3)0,140(3)γ(?1,13)(Np)350,710,00000139(5)
γ20,3(Np)358,25(20)0,00000133(5)[E1]0,0220(4)0,00419(8)0,00101(2)0,0275(6)γ16,0(Np)368,62(3)0,000347(9)(M1)0,494(10)0,0963(19)0,0233(5)0,622(12)
keV×100
γ17,0(Np)370,94(3)0,000080(4)M1+16%E20,42(6)0,086(8)0,0211(10)0,53(7)γ(?1,14)(Np)374,830,00000313(5)
γ22,3(Np)376,65(3)0,000225(9)(M1)0,466(9)0,0908(18)0,0220(5)0,586(12)γ23,3(Np)383,81(3)0,000037(7)[M1+E2]0,25(20)0,06(3)0,015(6)0,33(23)γ(?1,15)(Np)389,0(3)0,0000005
γ(?1,16)(Np)390,61(5)0,00000573(8)
γ32,9(Np)398,64(15)
γ29,7(Np)400,78(10)0,00000018(5)[M1+E2]0,22(18)0,054(23)0,013(6)0,29(21)γ30,7(Np)406,35(15)0,00000175(28)[M1+E2]0,21(17)0,052(22)0,013(5)0,28(20)γ(?1,17)(Np)411,270,00000018(4)
γ22,1(Np)419,33(4)0,000036(5)[M1+E2]0,19(16)0,047(21)0,012(5)0,26(18)γ23,1(Np)426,47(4)0,000039(9)[M1+E2]0,19(15)0,045(20)0,011(5)0,25(18)γ(?1,18)(Np)429,9(1)0,00000109(5)
γ(?1,19)(Np)440,630,00000056(3)
γ(?1,20)(Np)442,81(7)0,00000331(7)
γ35,13(Np)446,15(6)0,00000011(2)
γ22,0(Np)452,6(2)0,00000251(7)[E2]0,0357(7)0,0205(4)0,00543(11)0,0635(13)γ26,2(Np)454,66(8)0,0000129(2)[M1]0,279(6)0,0542(11)0,0131(3)0,351(7)γ23,0(Np)459,68(10)0,0000043(5)[M1+E2]0,15(12)0,036(17)0,009(4)0,20(14)γ29,5(Np)462,34(8)0,0000012[M1+E2]0,15(12)0,035(17)0,009(4)0,20(14)γ30,5(Np)468,12(15)0,0000032(4)[M1+E2]0,15(12)0,034(16)0,008(4)0,19(14)γ(?1,21)(Np)486,050,00000105(6)
γ28,4(Np)487,13(4)0,00000080(6)[M1]0,232(6)0,0449(9)0,0109(2)0,291(6)γ(?1,22)(Np)494,390,00000010(2)
γ(?1,23)(Np)501,390,00000014(2)
γ27,1(Np)512,5(3)0,00000210(41)[E1]0,0107(2)0,00195(4)0,00047(1)0,0133(3)γ26,0(Np)514,0(5)0,0000039(2)[E1]0,0106(2)0,00194(4)0,00047(1)0,0132
γ30,3(Np)522,06(15)0,00000113(11)[M1+E2]0,11(9)0,025(13)0,006(3)0,14(10)γ(?1,24)(Np)525,140,00000016(3)
γ38,13(Np)529,17(20)0,00000072(5)[E2]0,0269(5)0,0124(2)0,00324(6)0,0437(9)γ(?1,25)(Np)532,440,00000008(2)
γ27,0(Np)546,12(6)0,00000025(3)[E1]0,00947(19)0,00171(3)0,00041(1)0,0117(2)γ(?1,26)(Np)548,150,00000005(2)
γ(?1,27)(Np)555,250,00000009(2)
γ33,6(Np)563,46(2)0,000000460(21)[E2]0,0241(5)0,0102(2)0,00266(5)0,0378(8)γ36,8(Np)573,94(20)0,00000142(12)[M1+E2]0,09(7)0,019(10)0,0027(16)0,11(8)γ(?1,28)(Np)582,890,00000101(6)
γ31,2(Np)586,59(20)0,00000128(5)[E2]0,0224(4)0,00903(18)0,00235(5)0,0346(7)γ28,0(Np)590,09(4)0,00000283(6)[E1]0,00818(16)0,00147(3)0,000351(7)0,0101(2)γ34,6(Np)597,19(2)0,0000080(5)[M1+E2]0,08(6)0,017(9)0,0042(20)0,10(7)γ(?1,29)(Np)600,260,00000022(3)
γ33,4(Np)619,01(2)0,000065(5)[M1+E2]0,07(5)0,016(8)0,0037(10)0,09(7)γ38,8(Np)627,18(20)0,00000056(4)[M1+E2]0,07(5)0,015(8)0,0037(10)0,09(6)γ32,1(Np)632,93(15)0,00000124(5)
γ(?1,30)(Np)636,90,00000021(3)
γ36,6(Np)641,32(4)0,0000076(5)[M1+E2]0,06(5)0,014(8)0,0035(10)0,08(6)γ34,4(Np)652,73(2)0,0000410(25)[M1+E2]0,06(5)0,013(7)0,0033(10)0,08(6)γ33,2(Np)662,40(2)0,00045(10)(E0+M1+E2)0,18(4)0,045(15)0,23(5)γ32,0(Np)666,2(2)0,00000095(7)
γ36,5(Np)669,83(2)0,00000051(7)[E1]0,00647(13)0,00114(2)0,00073(1)0,0080(2)γ37,5(Np)675,78(13)0,00000091(7)[E2,M1]0,06(4)0,012(7)0,0030(15)0,07(5)γ34,3(Np)679,79(2)0,00000334(8)[E1]0,00630(13)0,00111(2)0,000265(5)0,00776(16)γ33,1(Np)688,72(4)0,0000325(6)[E1]0,00615(12)0,00108(2)0,000259(5)0,00758(16)γ(?1,31)(Np)693,460,00000354(7)
γ34,2(Np)696,14(2)0,0000055(3)[M1+E2]0,05(4)0,011(6)0,0028(10)0,07(5)γ(?1,32)(Np)709,42(5)0,00000641(18)
γ(?1,33)(Np)712,50,00000020(3)
γ33,0(Np)721,96(2)0,000197(5)[E1]0,0056(1)0,00099(2)0,00024(1)0,0070(2)γ37,3(Np)729,72(15)0,00000151(6)[M1]0,079(2)0,0151(4)0,0036(1)0,099(2)
keV×100
γ(?1,34)(Np)731,440,00000046(4)
γ(?1,35)(Np)736,680,00000128(5)
γ35,1(Np)737,34(5)0,00000794(8)
γ(?1,36)(Np)740,510,00000019(3)
γ(?1,37)(Np)742,9(3)0,00000035
γ(?1,38)(Np)745,020,00000009(2)
γ(?1,39)(Np)750,390,00000006(2)
γ34,0(Np)755,68(2)0,00000789(11)[E1]0,0052(1)0,00091(1)0,000217(4)0,0064(1)γ(?1,40)(Np)759,5(1)0,00000181(5)
γ(?1,41)(Np)763,310,00000023(2)
γ36,1(Np)766,62(4)0,00000504(6)[E1]0,00507(10)0,00088(2)0,000211(4)0,00623(12)γ35,0(Np)770,57(10)0,00000481(5)
γ37,1(Np)772,57(12)0,00000303(5)[M1]0,0675(14)0,0129(3)0,00312(6)0,0847(17)γ(?1,42)(Np)774,670,00000011(2)
γ(?1,43)(Np)777,390,00000015(2)
γ(?1,44)(Np)780,530,00000031(2)
γ(?1,45)(Np)782,2(5)0,00000015
γ39,3(Np)786,00(15)0,00000062(0)
γ(?1,46)(Np)789,0(3)0,00000042(6)
γ(?1,47)(Np)792,60,00000003(1)
γ(?1,48)(Np)794,92(20)0,00000094
γ39,2(Np)801,94(20)0,00000123(7)
γ(?1,49)(Np)803,190,00000016(3)
γ37,0(Np)805,77(12)0,00000033[M1,E2]0,037(24)0,008(4)0,0019(10)0,05(3)γ(?1,50)(Np)811,9(3)0,00000063(6)
γ(?1,51)(Np)819,330,00000043(6)
γ(?1,52)(Np)822,210,00000024(6)
γ39,1(Np)828,60(12)0,00000021(4)
γ(?1,53)(Np)835,210,00000003(1)
γ(?1,54)(Np)838,880,00000004(1)
γ(?1,55)(Np)841,140,00000010(3)
γ(?1,56)(Np)843,70,00000097(8)
γ(?1,57)(Np)846,860,00000016(3)
γ(?1,58)(Np)847,4(5)0,0000003
γ(?1,59)(Np)851,6(10)0,00000041(6)
γ(?1,60)(Np)854,950,00000023(4)
γ(?1,61)(Np)856,260,00000010(3)
γ40,2(Np)861,34(20)0,00000008
γ39,0(Np)861,80(12)0,00000061(6)
γ(?1,62)(Np)870,630,00000150(3)
γ(?1,63)(Np)8820,00000004(1)
γ(?1,64)(Np)886,530,00000015(3)
γ40,1(Np)887,68(20)0,00000033(6)
γ(?1,65)(Np)890,380,00000032(5)
γ(?1,66)(Np)894,470,00000003(1)
γ(?1,67)(Np)898,170,00000006(2)
γ(?1,68)(Np)902,610,00000033(3)
γ(?1,69)(Np)909,950,00000005(1)
γ(?1,70)(Np)912,40,00000028(3)
γ40,0(Np)920,88(20)0,00000019(3)
γ(?1,71)(Np)928,950,00000009(2)
γ(?1,72)(Np)939,20,00000005(1)
γ41,0(Np)946,060,000000010(3)
γ(?1,73)(Np)952,720,00000003(1)
γ(?1,74)(Np)955,910,00000060(5)
γ42,0(Np)962,190,00000004(1)
γ(?1,75)(Np)969,090,00000003(1)
γ(?1,76)(Np)980,840,00000003(1)
γ43,0(Np)1014,330,0000010(2)
3Atomic Data
3.1Np
ωK:0,971(4)
ˉωL:0,511(20)
n KL:0,791(5)
3.1.1X Radiations
Energy Relative
keV probability X K
Kα297,06962,82
Kα1101,059100
Kβ3113,303}
Kβ1114,234}
Kβ 5114,912}36,21
Kβ2117,463}
Kβ4117,876}12,47
KO2,3118,429}
X L
L 11,89
Lα13,76–13,944
Lη15,876
Lβ16,13–17,79
Lγ20,12–22,2
3.1.2Auger Electrons
Energy Relative
keV probability
Auger K
KLL73,50–83,13100
KLX90,36–97,2860,2
KXY107,10–114,589,06
Auger L6,04–13,5255000000
4αEmissions
Energy Probability
keV×100
α0,364757,58(13)0,00004(3)
α0,344800,99(13)0,000086
α0,334834,15(13)0,0007
α0,324888,98(15)
α0,304956,06(15)
α0,294961,63(14)
α0,284963,83(13)
α0,275007,07(14)0,0001
α0,255055,36(13)
α0,245065,97(15)0,00011
α0,235092,06(13)～0,0004
α0,225099,08(13)～0,0004
α0,215106,72(16)
α0,205117,21(13)0,0004
α0,195132,8(2)
α0,185155,12(13)0,0007
α0,175179,35(13)0,0003
α0,165181,63(13)0,0009
α0,155190,17(23)0,0006
α0,145217,26(13)
α0,135225,08(13)0,0013
α0,125232,6(3)
α0,115244,13(13)0,0022(3)
α0,95280,99(13)0,0005
α0,85321,87(13)0,014(3)
α0,65388,25(13)1,66(3)
α0,55416,28(13)～0,01
α0,45442,86(12)13,23(10)
α0,35469,47(12)<0,04
α0,25485,56(12)84,45(10)
α0,15511,46(12)0,23(1)
α0,05544,11(12)0,38(1)
5Electron Emissions
Energy Electrons
keV per100disint.
e AL(Np)6,04-13,5233,4(17)
e AK(Np)0,000114(16)
KLL73,50-83,13}
KLX90,36-97,28}
KXY107,10-114,58}
ec2,1L(Np)3,92-8,7314(5)
ec1,0L(Np)10,769-15,59015,9(21)
ec3,1L(Np)20,28-25,090,31(7)
ec2,1M(Np)20,606-22,6813,7(5)
ec4,2L(Np)20,99-25,818,8(12)
ec1,0M(Np)27,46-29,534,0(6)
ec1,0N(Np)31,70-32,791,08(16)
ec6,4L(Np)33,13-37,950,87(11)
ec3,1M(Np)36,97-39,040,076(17)
ec2,0L(Np)37,114-41,93030,2(22)
ec4,2M(Np)37,68-39,762,3(4)
ec4,2N(Np)41,92-43,020,65(9)
ec6,4M(Np)49,82-51,900,228(30)
ec2,0M(Np)53,802-55,8778,12(25)
ec6,4N(Np)54,06-55,160,062(8)
ec6,2L(Np)76,54-81,360,225(5)
ec6,2M(Np)93,23-95,310,0625(16)
6Photon Emissions
6.1X-Ray Emissions
Energy Photons
keV per100disint.
XL(Np)11,89—22,237,66(17)
XKα2(Np)97,0690,001134(30)}KαXKα1(Np)101,0590,00181(5)}
XKβ3(Np)113,303}
XKβ1(Np)114,234}0,000658(21)K β1 XKβ 5(Np)114,912}
XKβ2(Np)117,463}
XKβ4(Np)117,876}0,000226(8)K β2 XKO2,3(Np)118,429}
6.2Gamma Emissions
Energy Photons
keV per100disint.
γ2,1(Np)26,3446(2)2,31(8)
γ(?1,1)(Np)32,1830,0174(4)
γ1,0(Np)33,1963(3)0,1215(28)γ3,1(Np)42,704(5)0,0055(11)γ4,2(Np)43,420(3)0,0669(29)γ14,10(Np)51,01(3)0,000026(12)γ6,4(Np)55,56(2)0,0181(18)γ(?1,2)(Np)57,85(5)0,0052(15)γ2,0(Np)59,5409(1)35,92(17)γ14,9(Np)64,83(2)0,00014(2)
γ8,6(Np)67,50(2)0,00042(10)γ4,1(Np)69,76(3)0,0029(4)
γ3,0(Np)75,90(1)0,0006
γ5,1(Np)96,79(3)0,000047(16)γ6,2(Np)98,97(2)0,0203(4)
γ4,0(Np)102,98(2)0,0195(4)
γ(?1,3)(Np)106,42(5)0,000015
γ20,13(Np)109,70(7)0,0000049
γ21,13(Np)120,36(8)0,0000045
γ8,4(Np)123,05(1)0,00100(4)
γ6,1(Np)125,30(2)0,0041(2)
γ29,22(Np)139,44(8)0,0000053(11)γ11,6(Np)146,55(3)0,00046(1)
γ8,3(Np)150,04(3)0,000073(5)
γ26,15(Np)154,27(20)0,0000005
γ29,20(Np)159,26(20)0,0000014(5)
γ24,13(Np)161,54(10)0,0000015
γ9,4(Np)164,61(2)0,000066(3)
γ13,6(Np)165,81(6)0,000023(1)
γ18,8(Np)169,56(3)0,00017(1)
γ11,5(Np)175,07(4)0,000018(3)
γ(?1,7)(Np)190,40,0000022(5)
γ25,11(Np)191,96(4)0,0000215(10)γ29,18(Np)196,76(8)0,00000049
γ(?1,8)(Np)201,70(14)0,0000008
γ18,7(Np)204,06(6)0,00000206(6)
γ9,2(Np)208,005(23)0,000786(9)
γ13,4(Np)221,46(3)0,0000434(8)
γ26,10(Np)232,81(5)0,00000482(9)
γ9,1(Np)234,40(4)0,00000087(8)
γ26,9(Np)246,73(10)0,00000244(7)
γ13,3(Np)248,52(3)0,00000146(3)
γ22,7(Np)261,00(7)0,00000129(6)
γ13,2(Np)264,88(3)0,00000943(12)γ9,0(Np)267,54(4)0,0000268(6)
keV per100disint.γ(?1,9)(Np)270,63(15)0,0000005(2)γ(?1,10)(Np)271,540,00000144(5)γ20,6(Np)275,77(8)0,00000632(10)γ27,9(Np)278,04(15)0,00000115(3)γ13,1(Np)291,3(2)0,00000305(8)γ16,3(Np)292,77(6)0,0000142(3)γ20,5(Np)304,21(20)0,00000093(2)γ16,2(Np)309,1(3)0,0000020(3)γ22,5(Np)322,56(3)0,000151(4)γ(?1,11)(Np)324,690,0000018(3)γ(?1,12)(Np)329,690,0000011(2)γ14,0(Np)332,35(3)0,000150(4)γ16,1(Np)335,37(3)0,000496(7)γ17,1(Np)337,7(2)0,00000488(9)γ(?1,13)(Np)350,710,00000139(5)γ20,3(Np)358,25(20)0,00000129(5)γ16,0(Np)368,62(3)0,000214(5)γ17,0(Np)370,94(3)0,0000520(8)γ(?1,14)(Np)374,830,00000313(6)γ22,3(Np)376,65(3)0,000137(3)γ23,3(Np)383,81(3)0,0000281(6)γ(?1,15)(Np)389,0(3)0,00000049
γ(?1,16)(Np)390,61(5)0,00000573(10)γ29,7(Np)400,78(10)0,00000014(3)γ30,7(Np)406,35(15)0,00000137(5)γ(?1,17)(Np)411,270,00000018(4)γ22,1(Np)419,33(4)0,0000284(4)γ23,1(Np)426,47(4)0,000031(6)γ(?1,18)(Np)429,9(1)0,00000109(5)γ(?1,19)(Np)440,630,00000056(3)γ(?1,20)(Np)442,81(7)0,00000331(8)γ35,13(Np)446,15(6)0,00000011(2)γ22,0(Np)452,6(2)0,00000236(7)γ26,2(Np)454,66(8)0,00000953(12)γ23,0(Np)459,68(10)0,00000355(7)γ29,5(Np)462,34(8)0,000001
γ30,5(Np)468,12(15)0,00000269(6)γ(?1,21)(Np)486,050,00000105(6)γ28,4(Np)487,13(4)0,00000062(5)γ(?1,22)(Np)494,390,00000010(2)γ(?1,23)(Np)501,390,00000014(2)γ27,1(Np)512,5(3)0,0000021(4)γ26,0(Np)514,0(5)0,0000038(2)γ30,3(Np)522,06(15)0,00000099(5)γ(?1,24)(Np)525,140,00000016(3)γ38,13(Np)529,17(20)0,00000069(5)γ(?1,25)(Np)532,440,00000008(2)
keV per100disint.γ27,0(Np)546,12(6)0,00000025(3)γ(?1,26)(Np)548,150,00000005(2)γ(?1,27)(Np)555,250,00000009(2)γ33,6(Np)563,46(2)0,00000044(2)γ36,8(Np)573,94(20)0,00000128(5)γ(?1,28)(Np)582,890,00000101(6)γ31,2(Np)586,59(20)0,00000124(5)γ28,0(Np)590,09(4)0,00000280(6)γ34,6(Np)597,19(2)0,00000729(11)γ(?1,29)(Np)600,260,00000022(3)γ33,4(Np)619,01(2)0,000060(2)γ38,8(Np)627,18(20)0,00000051(2)γ32,1(Np)632,93(15)0,00000124(5)γ(?1,30)(Np)636,90,00000021(3)γ36,6(Np)641,32(4)0,00000704(10)γ34,4(Np)652,73(2)0,0000376(9)γ33,2(Np)662,40(2)0,000367(6)γ32,0(Np)666,2(2)0,00000095(7)γ36,5(Np)669,83(2)0,00000051(7)γ37,5(Np)675,78(13)0,00000085(5)γ34,3(Np)679,79(2)0,00000331(8)γ33,1(Np)688,72(4)0,0000323(6)γ(?1,31)(Np)693,460,00000354(8)γ34,2(Np)696,14(2)0,00000517(8)γ(?1,32)(Np)709,42(5)0,00000641(19)γ(?1,33)(Np)712,50,00000020(3)γ33,0(Np)721,96(2)0,000196(5)γ37,3(Np)729,72(15)0,00000137(5)γ(?1,34)(Np)731,440,00000046(4)γ(?1,35)(Np)736,680,00000128(5)γ35,1(Np)737,34(5)0,00000794(11)γ(?1,36)(Np)740,510,00000019(3)γ(?1,37)(Np)742,9(3)0,00000035
γ(?1,38)(Np)745,020,00000009(2)γ(?1,39)(Np)750,390,00000006(2)γ34,0(Np)755,68(2)0,00000784(11)γ(?1,40)(Np)759,5(1)0,00000181(5)γ(?1,41)(Np)763,310,00000023(2)γ36,1(Np)766,62(4)0,00000501(6)γ35,0(Np)770,57(10)0,00000481(7)γ37,1(Np)772,57(12)0,00000279(4)γ(?1,42)(Np)774,670,00000011(2)γ(?1,43)(Np)777,390,00000015(2)γ(?1,44)(Np)780,530,00000031(2)γ(?1,45)(Np)782,2(5)0,00000015
γ39,3(Np)786,00(15)0,00000062
γ(?1,46)(Np)789,0(3)0,00000042(6)
keV per100disint.
γ(?1,47)(Np)792,60,00000003(1)γ(?1,48)(Np)794,92(20)0,00000094
γ39,2(Np)801,94(20)0,00000123(7)γ(?1,49)(Np)803,190,00000016(3)γ37,0(Np)805,77(12)0,00000031
γ(?1,50)(Np)811,9(3)0,00000063(6)γ(?1,51)(Np)819,330,00000043(6)γ(?1,52)(Np)822,210,00000024(6)γ39,1(Np)828,60(12)0,00000021(4)γ(?1,53)(Np)835,210,00000003(1)γ(?1,54)(Np)838,880,00000004(1)γ(?1,55)(Np)841,140,00000010(3)γ(?1,56)(Np)843,70,00000097(8)γ(?1,57)(Np)846,860,00000016(3)γ(?1,58)(Np)847,4(5)0,00000027(3)γ(?1,59)(Np)851,6(10)0,00000041(6)γ(?1,60)(Np)854,950,00000023(4)γ(?1,61)(Np)856,260,00000010(3)γ40,2(Np)861,34(20)0,00000008(3)γ39,0(Np)861,80(12)0,00000061(6)γ(?1,62)(Np)870,630,00000150(4)γ(?1,63)(Np)8820,00000004(1)γ(?1,64)(Np)886,530,00000015(3)γ40,1(Np)887,68(20)0,00000033(6)γ(?1,65)(Np)890,380,00000032(5)γ(?1,66)(Np)894,470,00000003(1)γ(?1,67)(Np)898,170,00000006(2)γ(?1,68)(Np)902,610,00000033(3)γ(?1,69)(Np)909,950,00000005(1)γ(?1,70)(Np)912,40,00000028(3)γ40,0(Np)920,88(20)0,00000019(3)γ(?1,71)(Np)928,950,00000009(2)γ(?1,72)(Np)939,20,00000005(1)γ41,0(Np)946,060,000000010(2)γ(?1,73)(Np)952,720,00000003(1)γ(?1,74)(Np)955,910,00000060(5)γ42,0(Np)962,190,00000004(1)γ(?1,75)(Np)969,090,00000003(1)γ(?1,76)(Np)980,840,00000003(1)γ43,0(Np)1014,330,0000010(2) 7Main Production Modes
Pu?241(β?)Am?241
8References
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(gamma-ray emission probabilities.)
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(half-life.)
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(Q value.)
- A.Iwahara,M.A.L.da Silva,A.E.Carvalho Filho,E.M.de Oliveira Bernardes,J.U.Delgado. Appl.Rad.Isotopes63(2005)107
(absolute emission probabilities of gamma-rays.)
-M.S.Basunia.Nucl.Data Sheets107(2006)2323
(241Am decay scheme,237Np level energies and gamma-ray transition multipolarities.)
-M.C.L′e py,J.Plagnard,L.Ferreux.Appl.Rad.Isotopes66(2008)715
(absolute emission probabilities of LX-rays.)
-V.M.Gorozhankin,M.-M.B′e.Appl.Rad.Isotopes66(2008)722
(ICC for anomalous E1gamma-ray transitions.)
-T.Kibedi,W.Burrows,M. B.Trzhaskovskaya,P.M.Davidson, C.W.Nestor Jr..Nucl.Instrum. Methods Phys.Res.A589(2008)202
(Band-Raman ICC for gamma-ray transitions.)
- E.Sch¨o nfeld,U.Sch¨o tzig.Appl.Rad.Isotopes54(2001)785
(calculated absolute emission probabilities of LX-rays.)
-M.M.B′e,R.Helmer,V.Chist′e.J.Nucl.Sci.Tech.,suppl.2(2002)481
(Saisinuc software.)
-G.Audi,A.H.Wapstra,C.Thibault.Nucl.Phys.A729(2003)337
(Q value.)
- A.Iwahara,M.A.L.da Silva,A.E.Carvalho Filho,E.M.de Oliveira Bernardes,J.U.Delgado. Appl.Rad.Isotopes63(2005)107
(absolute emission probabilities of gamma-rays.)
-M.S.Basunia.Nucl.Data Sheets107(2006)2323
(241Am decay scheme,237Np level energies and gamma-ray transition multipolarities.)
-M.C.L′e py,J.Plagnard,L.Ferreux.Appl.Rad.Isotopes66(2008)715
(absolute emission probabilities of LX-rays.)
-V.M.Gorozhankin,M.-M.B′e.Appl.Rad.Isotopes66(2008)722
(ICC for anomalous E1gamma-ray transitions.)
-T.Kibedi,W.Burrows,M. B.Trzhaskovskaya,P.M.Davidson, C.W.Nestor Jr..Nucl.Instrum. Methods Phys.Res.A589(2008)202
(Band-Raman ICC for gamma-ray transitions.)
Emission intensities per 100 disintegrations γ
1
54 ps +7/2
; 33,19629267 ns -5/2 ; 59,540923
56 ps
+9/2
; 75,8995
+11/2
; 129,996-9/2 ; 158,497
8
-11/2 ; 225,957
13
-(7/2) ; 324,42
33
-5/2 ; 721,961
35
770,57
36-9/2 ; 799,8237+(7/2,9/2) ; 805,7738
-11/2 ; 853,3639+(5/2,7/2) ; 861,6540
920,8841946
4296243
1014
2,144 (7) x 10^6 a
+5/2
; 0Np
23793
144
Q = 5637,82 keV
α95
146
0,38
0,2384,450,04
0,01
1,66
0,014
0,0013
0,0007
0,00004
,000
004810,000007940,000000110,000005010,000000510,000007040,00000128 0,000000310,000002790,000001370,000000850,000000510,000000690,00000061
0,000000210,000001230,000000620,000000190,000000330,000000080,000
00
10
,0
00
40,0
00
1
Emission intensities per 100 disintegrations γ
1
54 ps +7/2
; 33,19629267 ns -5/2 ; 59,54092
3
56 ps +9/2
; 75,8994
80 ps
-7/2 ; 102,959
5
+11/2
; 129,996
-9/2 ; 158,497
7
+13/2
; 191,539
5,2 ns
-3/2 ; 267,556
18
-15/2 ; 395,53
20
-(11/2) ; 434,12
22+9/2
; 452,54523
+7/2
; 459,69329
+13/2
; 592,3330
+11/2
; 597,9931
-(9/2) ; 646,03
32+(5/2,7/2)
; 666,1933
-5/2 ; 721,961
34
-7/2 ; 755,685
2,144 (7) x 10^6 a
+5/2
; 0Np
23793
144
Q = 5637,82 keV
α95
146
0,38
0,23
84,450,0413,23
0,011,660,0005
0,0007
0,0004
0,00040,0004
0,0007
0,000086
,00
00010,000000140,000000490,00000140,00000530,
000000990,000002690,00000137
,0000
01240,000000950,00000124
0,0001960,0000323
0,0003670,000060,000000440,00000784
0,000005170,000003310,00003760,00000729
Emission intensities per 100 disintegrations γ
1
54 ps +7/2
; 33,19629267 ns -5/2 ; 59,54092
356 ps +9/2
; 75,899480 ps -7/2 ; 102,959
5
+11/2
; 129,997
+13/2
; 191,538
-11/2 ; 225,957
9
5,2 ns -3/2 ; 267,556
10
-1/2 ; 281,356
11
-13/2 ; 305,05
13
-(7/2) ; 324,42
15
-(5/2) ; 359,7
22
+9/2
; 452,54523+7/2 ; 459,69324
-(9/2) ; 486,2125-17/2 ; 497,01
26-(3/2) ; 514,19
27
-(5/2) ; 546,12
28
-(7/2) ; 590,09
2,144 (7) x 10^6 a
+5/2
; 0Np
23793
144
Q = 5637,82 keV
α95
146
0,38
0,23
84,45
0,04
13,23
0,01
0,014
0,0005
0,0022
0,0013
0,0006
0,0004
0,0004
0,00011
0,0001
0,0
000
02360,00002840,0001370,0001510,000001290,0
0000355
0,0000310,0000281
0,00000
150,00002150,00
00380,000009530,000002440,000004820,00000050
,000000250,00000210,00000115
,00000280,00000062
Emission intensities per 100 disintegrations γ
1
54 ps
+7/2
; 33,196292
67 ns -5/2 ; 59,54092
356 ps +9/2
; 75,8995
+11/2
; 129,996
-9/2 ; 158,497
7
+13/2
; 191,538
-11/2 ; 225,957
9
5,2 ns
-3/2 ; 267,556
10
-1/2 ; 281,356
11
-13/2 ; 305,05
13
-(7/2) ; 324,42
14
1 ns +1/2
; 332,37615
-(5/2) ; 359,7
16+5/2
; 368,60217+3/2
; 370,92818
-15/2 ; 395,53
20
-(11/2) ; 434,12
21
444,78
2,144 (7) x 10^6 a
+5/2
; 0Np
23793
144
Q = 5637,82 keV
α0
432,6 (6) a
-5/2 ; 0
Am
24195
146
0,38
0,23
84,45
0,04
0,01
1,66
0,014
0,0005
0,0022
0,0013
0,0006
0,00090,0003
0,0007
0,0004
α
,000150,000140,000026
,00
02
140,0004960,0000020,00001420,0
000520,00000488
,00000206
0,000170
,000001
290,000000930,00000632 0,0000049
0,000
045