ADOPTED LEVELS, GAMMAS for 239Np
Authors: E. Browne, J. K. Tuli | Citation: Nucl. Data Sheets 122, 293 (2014) | Cutoff date: 30-Jun-2013
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=722.5 keV 10 | S(n)= 6215.2 keV 11 | S(p)= 5285.5 keV 15 | Q(α)= 4599 keV 14 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 239U β- decay | B | 243Am α decay |
| C | 238U(3He,d),(α,t) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0 | ABC | 5/2+ | 2.356 d 3 % β- = 100 | |||||
| 31.1309 12 | ABC | 7/2+ | 31.131 2 | 100 | M1+E2 | 0 | 5/2+ | |
| 71.13 3 | ABC | 9/2+ | 71.2S | 100 | [E2] | 0 | 5/2+ | |
| 74.6640 10 | ABC | 5/2- | 1.39 ns 3 | 43.533 1 74.664 1 | 8.27 15 100 | E1 E1 | 31.1309 0 | 7/2+ 5/2+ |
| 117.715 10 | ABC | 7/2- | ≤ 40 ps | 43.1 86.71 2 117.60 15 | 11.5 59 7 100 14 | M1+E2 E1 E1 | 74.6640 31.1309 0 | 5/2- 7/2+ 5/2+ |
| 122.5 10 | ABC | (11/2+) | ||||||
| 173.086 18 | ABC | 9/2- | 50.6 55.4 98.5 141.89 3 | ≈2.6 ≈8.7 ≈8.2 100 7 | [E1] M1+E2 (E2) E1 | 122.5 117.715 74.6640 31.1309 | (11/2+) 7/2- 5/2- 7/2+ | |
| 180.0 12 | C | (13/2+) | ||||||
| 220.2 12 | C | (1/2+) | ||||||
| 241.312 24 | ABC | (11/2-) | 169 | 100 | [E1] | 71.13 | 9/2+ | |
| 257.63 25 ? | A C | (3/2+) | ||||||
| 260.81 3 | A C | (3/2-) | 142.93 186.15 4 260.86 9 | 7.1 100 10 11 1 | 117.715 74.6640 0 | 7/2- 5/2- 5/2+ | ||
| 267 3 ? | B | |||||||
| 270.9 14 | C | (1/2-) | ||||||
| 315.5 11 | C | (7/2-) | ||||||
| 317.4 15 | B | (13/2-) | 195 | 100 | [E1] | 122.5 | (11/2+) | |
| 325 3 | BC | (5/2-) | ||||||
| 347.33 23 | ABC | (9/2+,7/2+) | ||||||
| 359.12 20 | AB | (9/2+) | ||||||
| 411 3 | B | |||||||
| 420.6 22 | C | |||||||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 427 3 | B | |||||||
| 438.79 5 | ABC | (11/2+) | 197.28 12 407.70 5 | 75 13 100 | 241.312 31.1309 | (11/2-) 7/2+ | ||
| 448.15 3 | A C | (3/2-) | 187.28 8 330.14 14 373.51 4 448.19 6 | 23 3 2.8 6 100 7 37 3 | 260.81 117.715 74.6640 0 | (3/2-) 7/2- 5/2- 5/2+ | ||
| 452.76 4 | A | (5/2+,7/2-) | 191.97 6 378.06 6 381.27 16 | 25 100 9 6.4 18 | 260.81 74.6640 71.13 | (3/2-) 5/2- 9/2+ | ||
| 474.36 6 ? | A | 399.13 13 474.5 1 | 89 16 100 13 | 74.6640 0 | 5/2- 5/2+ | |||
| 482.6 11 | C | (5/2-) | ||||||
| 517.98 3 | A C | (7/2-) | 486.87 3 518.01 9 | 100 7 7.3 7 | 31.1309 0 | 7/2+ 5/2+ | ||
| 530.21 8 ? | A | 455.26 18 499.1 1 530.5 2 | 40 16 100 13 53 | 74.6640 31.1309 0 | 5/2- 7/2+ 5/2+ | |||
| 547.0 23 ? | C | (13/2+) | ||||||
| 563.87 5 | A | 111.0 2 492.76 7 532.86 10 564.09 20 | 100 26 2 12 2 2 1 | 452.76 71.13 31.1309 0 | (5/2+,7/2-) 9/2+ 7/2+ 5/2+ | |||
| 579.34 7 | A C | (9/2-) | 504.76 8 547.99 16 | 100 8 38 8 | 74.6640 31.1309 | 5/2- 7/2+ | ||
| 600 3 ? | C | |||||||
| 616 3 ? | C | |||||||
| 637.2 18 ? | C | |||||||
| 657 3 ? | C | (11/2-) | ||||||
| 662.261 15 | AB | (5/2-) | 544.48 9 587.63 5 631.10 3 662.26 2 | 2.1 2 11.4 5 40 2 100 6 | 117.715 74.6640 31.1309 0 | 7/2- 5/2- 7/2+ 5/2+ | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 695.10 4 | A C | (7/2-) | 220.52 4 522.12 10 577.15 14 624.11 7 664.17 9 695.18 8 | 100 10 8.5 10 ≤4.8 22 1 19 2 13 1 | 474.36 173.086 117.715 71.13 31.1309 0 | 9/2- 7/2- 9/2+ 7/2+ 5/2+ | ||
| 723.7 22 | C | |||||||
| 741.6 21 | C | (9/2-) | ||||||
| 778.6 13 | C | |||||||
| 784.96 5 ? | A | |||||||
| 819.209 18 | A | (7/2-) | 240.00 15 255.71 12 558.46 17 577.15 14 646.26 10 748.09 3 788.19 7 819.19 2 | 0.67 18 0.9 2 0.46 18 ≤1.1 2.2 2 69 4 3.8 3 100 5 | 579.34 563.87 260.81 241.312 173.086 71.13 31.1309 0 | (9/2-) (3/2-) (11/2-) 9/2- 9/2+ 7/2+ 5/2+ | ||
| 823.4 17 | C | |||||||
| 844.072 15 | A | (7/2-) | 326.21 7 602.79 2 769.52 17 772.95 5 812.93 4 844.10 4 | 3.2 3 3.5 2 0.3 1 2.1 2 50 3 100 5 | 517.98 241.312 74.6640 71.13 31.1309 0 | (7/2-) (11/2-) 5/2- 9/2+ 7/2+ 5/2+ | ||
| 849.45 4 | A | 490.33 13 502.12 17 588.70 8 591.82 19 727.52 10 774.77 4 849.44 9 | 4.5 9 3.9 12 36 2 6 2 17 2 100 6 13 1 | 359.12 347.33 260.81 257.63 122.5 74.6640 0 | (9/2+) (9/2+,7/2+) (3/2-) (3/2+) (11/2+) 5/2- 5/2+ | |||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 863.43 9 ? | A | 201.09 8 746.06 11 862.56 18 | 12 4 100 13 10 3 | 662.261 117.715 0 | (5/2-) 7/2- 5/2+ | |||
| 864.9 12 | C | (9/2+) | ||||||
| 890.6 12 | C | |||||||
| 917.1 11 | C | |||||||
| 951.5 13 | C | |||||||
| 959.17 3 | A | 174.07 6 296.93 8 395.19 11 841.48 12 884.45 5 887.83 10 928.00 6 ? 959.48 6 | 100 10 ≤15 21 3 26 4 89 5 24 3 53 3 80 5 | 784.96 662.261 563.87 117.715 74.6640 71.13 31.1309 0 | (5/2-) 7/2- 5/2- 9/2+ 7/2+ 5/2+ | |||
| 964.08 17 | A | (7/2-) | 301.64 15 703.63 10 722.85 4 791.33 6 846.39 4 889.49 4 933.09 3 964.30 5 | 1.2 3 2.6 3 30 2 8.3 5 35 2 23 1 29 2 100 5 | 662.261 260.81 241.312 173.086 117.715 74.6640 31.1309 0 | (5/2-) (3/2-) (11/2-) 9/2- 7/2- 5/2- 7/2+ 5/2+ | ||
| 966.53 6 | A | 304.17 10 514.1 3 793.55 8 849.44 9 895.15 15 | 57 23 100 72 8 30 7 | 662.261 452.76 173.086 117.715 71.13 | (5/2-) (5/2+,7/2-) 9/2- 7/2- 9/2+ | |||
| 992.05 3 | A C | (7/2-) | 296.93 13 874.22 7 917.40 8 920.95 8 960.99 5 992.00 7 | ≤14 32 2 25 2 25 2 100 5 27 2 | 695.10 117.715 74.6640 71.13 31.1309 0 | (7/2-) 7/2- 5/2- 9/2+ 7/2+ 5/2+ | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 1019.9 12 | C | (13/2+) | ||||||
| 1040.39 4 | A | (5/2-,7/2-) | 258.80 16 345.13 8 567.88 18 587.63 5 779.57 14 867.11 10 922.83 13 965.58 10 1009.38 18 1040.19 9 | 3.8 10 20 2 2 1 100 5 3 1 4.0 5 3.1 6 10 1.50 5 5.8 5 | 784.96 695.10 474.36 452.76 260.81 173.086 117.715 74.6640 31.1309 0 | (7/2-) (5/2+,7/2-) (3/2-) 9/2- 7/2- 5/2- 7/2+ 5/2+ | ||
| 1049.45 5 | A C | (9/2-) | 876.14 7 931.97 7 974.91 14 1018.14 13 | 35 100 7 7.5 15 ≤19 | 173.086 117.715 74.6640 31.1309 | 9/2- 7/2- 5/2- 7/2+ | ||
| 1077.2 14 | C | |||||||
| 1096.98 5 | A | (7/2+) | 312.05 3 434.44 13 644.12 14 658.5 4 1065.76 12 1096.92 8 | 100 23 4 38 8 11 12 2 33 3 | 784.96 662.261 452.76 438.79 31.1309 0 | (5/2-) (5/2+,7/2-) (11/2+) 7/2+ 5/2+ | ||
| 1117.8 13 | C | (11/2-) | ||||||
| 1141.1 17 | C | |||||||
| 1155.3 19 | C | |||||||
| 1182.5 14 | C | |||||||
| 1197.14 10 ? | A | 535.01 14 1122.8 3 1196.90 15 | 100 52 70 | 662.261 74.6640 0 | (5/2-) 5/2- 5/2+ | |||
E(level): From 239U β- Decay, unless otherwise specified.
Jπ(level): Jπ and configuration assignments are based on rotational band structure and systematics of Nilsson orbitals in nearby odd-A nuclei. Individual arguments are given mostly for rotational bandheads.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - 5/2[642] | |||||||
| 0 | 5/2+ | 2.356 d 3 % β- = 100 | |||||
| 31.1309 12 | 7/2+ | 31.131 2 | 100 | M1+E2 | 0 | 5/2+ | |
| 71.13 3 | 9/2+ | 71.2S | 100 | [E2] | 0 | 5/2+ | |
| 122.5 10 | (11/2+) | ||||||
| 180.0 12 | (13/2+) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - 5/2[523] | |||||||
| 74.6640 10 | 5/2- | 1.39 ns 3 | |||||
| 117.715 10 | 7/2- | ≤ 40 ps | 43.1 86.71 2 117.60 15 | 11.5 59 7 100 14 | M1+E2 E1 E1 | 74.6640 31.1309 0 | 5/2- 7/2+ 5/2+ |
| 173.086 18 | 9/2- | 50.6 55.4 98.5 141.89 3 | ≈2.6 ≈8.7 ≈8.2 100 7 | [E1] M1+E2 (E2) E1 | 122.5 117.715 74.6640 31.1309 | (11/2+) 7/2- 5/2- 7/2+ | |
| 241.312 24 | (11/2-) | 169 | 100 | [E1] | 71.13 | 9/2+ | |
| 317.4 15 | (13/2-) | 195 | 100 | [E1] | 122.5 | (11/2+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 3 - 1/2[400]? | |||||||
| 220.2 12 | (1/2+) | ||||||
| 257.63 25 | (3/2+) | ||||||
| 359.12 20 | (9/2+) | ||||||
| 438.79 5 | (11/2+) | 197.28 12 407.70 5 | 75 13 100 | 241.312 31.1309 | (11/2-) 7/2+ | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 4 - 1/2[530] | |||||||
| 260.81 3 | (3/2-) | ||||||
| 270.9 14 | (1/2-) | ||||||
| 315.5 11 | (7/2-) | ||||||
| 325 3 | (5/2-) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 5 - 3/2[521] | |||||||
| 448.15 3 | (3/2-) | ||||||
| 482.6 11 | (5/2-) | ||||||
| 517.98 3 | (7/2-) | 486.87 3 518.01 9 | 100 7 7.3 7 | 31.1309 0 | 7/2+ 5/2+ | ||
| 579.34 7 | (9/2-) | 504.76 8 547.99 16 | 100 8 38 8 | 74.6640 31.1309 | 5/2- 7/2+ | ||
| 657 3 | (11/2-) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 6 - 7/2[633]? | |||||||
| 864.9 12 | (9/2+) | ||||||
| 1019.9 12 | (13/2+) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 7 - 7/2[514] | |||||||
| 992.05 3 | (7/2-) | ||||||
| 1049.45 5 | (9/2-) | 876.14 7 931.97 7 974.91 14 1018.14 13 | 35 100 7 7.5 15 ≤19 | 173.086 117.715 74.6640 31.1309 | 9/2- 7/2- 5/2- 7/2+ | ||
| 1117.8 13 | (11/2-) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 8 - 5/2[523]×0+ | |||||||
| 662.261 15 | (5/2-) | ||||||
| 695.10 4 | (7/2-) | 220.52 4 522.12 10 577.15 14 624.11 7 664.17 9 695.18 8 | 100 10 8.5 10 ≤4.8 22 1 19 2 13 1 | 474.36 173.086 117.715 71.13 31.1309 0 | 9/2- 7/2- 9/2+ 7/2+ 5/2+ | ||
| 741.6 21 | (9/2-) | ||||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
| 31.1309 | 7/2+ | 31.131 2 | M1+E2 | 0.08 2 | 196 | α=196 20 | |
| 71.13 | 9/2+ | 71.2 | [E2] | 73.5 | α=73.5 | ||
| 74.6640 | 5/2- | 1.39 ns 3 | 43.533 1 | E1 | 1.16 | B(E1)(W.u.)=8.7E-5 5, α=1.16 | |
| 5/2- | 1.39 ns 3 | 74.664 1 | E1 | 0.28 | B(E1)(W.u.)=0.000208 15, α=0.28 | ||
| 117.715 | 7/2- | ≤ 40 ps | 43.1 | M1+E2 | 0.38 AP | 159 | B(E2)(W.u.)>6.9×102, B(M1)(W.u.)>0.032, α159 AP |
| 7/2- | ≤ 40 ps | 86.71 2 | E1 | 0.19 | B(E1)(W.u.)>0.00013, α=0.19 | ||
| 7/2- | ≤ 40 ps | 117.60 15 | E1 | 0.086 | B(E1)(W.u.)>0.00013, α=0.086 | ||
| 173.086 | 9/2- | 50.6 | [E1] | 0.78 | α=0.78 | ||
| 9/2- | 55.4 | M1+E2 | 0.6 2 | 87 | α=87 25 | ||
| 9/2- | 98.5 | (E2) | 15.9 | α=15.9 | |||
| 9/2- | 141.89 3 | E1 | 0.226 | α=0.226 | |||
| 241.312 | (11/2-) | 169 | [E1] | 0.15 | α=0.15 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 5/2+ | 2.356 d 3 % β- = 100 | %α≈1×10-10 from α syst (1980Sc26). E(level): %α≈1×10-10 from α syst (1980Sc26). 5/2[642]. |
| 31.1309 | 7/2+ | E(level): 5/2[642]. | |
| 71.13 | 9/2+ | E(level): 5/2[642]. | |
| 74.6640 | 5/2- | 1.39 ns 3 | μ=+2.0 3 Compare to +1.95 15 for 5/2[523] in 237Np and +3.14 4 for 5/2[642] in 237Np. In 243Am the 5/2[523] g.s. has μ=+1.503 14 (2011StZZ,1990Iz01). E(level): Compare to +1.95 15 for 5/2[523] in 237Np and +3.14 4 for 5/2[642] in 237Np. In 243Am the 5/2[523] g.s. has μ=+1.503 14 (2011StZZ,1990Iz01). 5/2[523]. |
| 117.715 | 7/2- | ≤ 40 ps | E(level): 5/2[523]. From 243Am α Decay. |
| 122.5 | (11/2+) | E(level): 5/2[642]. | |
| 173.086 | 9/2- | E(level): 5/2[523]. From 243Am α Decay. | |
| 180.0 | (13/2+) | E(level): 5/2[642]. | |
| 220.2 | (1/2+) | E(level): 1/2[400]?. Jπ(level): From (3He,d), based on measured L values and a comparison between experimental and calculated spectroscopic factors for various Nilsson orbitals. | |
| 241.312 | (11/2-) | E(level): 5/2[523]. | |
| 257.63 | (3/2+) | E(level): 1/2[400]?. Jπ(level): From (3He,d), based on measured L values and a comparison between experimental and calculated spectroscopic factors for various Nilsson orbitals. | |
| 260.81 | (3/2-) | E(level): 1/2[530]. Jπ(level): From (3He,d), rotational band parameter analogy to 237Np. | |
| 267 | E(level): From 243Am α Decay. | ||
| 270.9 | (1/2-) | E(level): 1/2[530]. Jπ(level): From (3He,d), rotational band parameter analogy to 237Np. | |
| 315.5 | (7/2-) | E(level): 1/2[530]. Jπ(level): From (3He,d), rotational band parameter analogy to 237Np. | |
| 317.4 | (13/2-) | E(level): 5/2[523]. From 243Am α Decay. | |
| 325 | (5/2-) | E(level): 1/2[530]. From 243Am α Decay. Jπ(level): From (3He,d), rotational band parameter analogy to 237Np. | |
| 359.12 | (9/2+) | E(level): 1/2[400]?. Jπ(level): From (3He,d), based on measured L values and a comparison between experimental and calculated spectroscopic factors for various Nilsson orbitals. | |
| 411 | E(level): From 243Am α Decay. | ||
| 427 | E(level): From 243Am α Decay. | ||
| 438.79 | (11/2+) | E(level): 1/2[400]?. Jπ(level): From (3He,d), based on measured L values and a comparison between experimental and calculated spectroscopic factors for various Nilsson orbitals. | |
| 448.15 | (3/2-) | E(level): 3/2[521]. | |
| 482.6 | (5/2-) | E(level): 3/2[521]. | |
| 517.98 | (7/2-) | E(level): 3/2[521]. | |
| 579.34 | (9/2-) | E(level): 3/2[521]. | |
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 657 | (11/2-) | E(level): 3/2[521]. | |
| 662.261 | (5/2-) | E(level): 5/2[523]×0+. | |
| 695.10 | (7/2-) | E(level): 5/2[523]×0+. | |
| 741.6 | (9/2-) | E(level): 5/2[523]×0+. | |
| 864.9 | (9/2+) | E(level): 7/2[633]?. | |
| 992.05 | (7/2-) | E(level): 7/2[514]. | |
| 1019.9 | (13/2+) | E(level): 7/2[633]?. | |
| 1049.45 | (9/2-) | E(level): 7/2[514]. | |
| 1117.8 | (11/2-) | E(level): 7/2[514]. |
| E(level) | E(gamma) | Comments |
| 117.715 | 43.1 | E(γ): Eγ from 243Am α Decay. Iγ, weighted average from 239U β- Decay and 243Am α Decay. I(γ): Eγ from 243Am α Decay. Iγ, weighted average from 239U β- Decay and 243Am α Decay. | 86.71 | E(γ): Eγ from 243Am α Decay. Iγ, weighted average from 239U β- Decay and 243Am α Decay. I(γ): Eγ from 243Am α Decay. Iγ, weighted average from 239U β- Decay and 243Am α Decay. | 117.60 | E(γ): Eγ from 243Am α Decay. Iγ, weighted average from 239U β- Decay and 243Am α Decay. I(γ): Eγ from 243Am α Decay. Iγ, weighted average from 239U β- Decay and 243Am α Decay. |
| 173.086 | 50.6 | E(γ): From 243Am α Decay. I(γ): From 243Am α Decay. | 55.4 | E(γ): From 243Am α Decay. I(γ): From 243Am α Decay. | 98.5 | E(γ): From 243Am α Decay. I(γ): From 243Am α Decay. | 141.89 | E(γ): From 243Am α Decay. I(γ): From 243Am α Decay. |
| 317.4 | 195 | E(γ): From 243Am α Decay. I(γ): From 243Am α Decay. |
| 695.10 | 577.15 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 819.209 | 577.15 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 849.45 | 849.44 | E(γ): Multiply placed with undivided intensity. Eγ from 243Am α Decay. Iγ, weighted average from 239U β- Decay and 243Am α Decay. I(γ): Multiply placed with undivided intensity. Eγ from 243Am α Decay. Iγ, weighted average from 239U β- Decay and 243Am α Decay. |
| 966.53 | 849.44 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
Calculations
Single-particle levels: 2004Pa40
Half-life: 2013Zd01, 2008Do12
β- decay: 2009So02
Evaluation of 239U β- decay: 2008BeZV
Nuclear reactions
238Np(n,γ) E=thermal. Calculated σ: 2012Pr13, 2011Ch57, 2004Ha11, 2010Pr07.
232Th, U(n,F), U(n,γ), U(n,2n): Deduced reaction rates: 2011Ad18
Cluster decay
239Np(30Mg): 2012Sa31
Alpha decay
239Np (α): Calculated T1/2, Q(α): 2011Sa40
243Am(α): Theory: 2003De17