ADOPTED LEVELS, GAMMAS for 81Se
Author: M. Shamsuzzoha Basunia | Citation: Nucl. Data Sheets 199, 271 (2025) | Cutoff date: 1-Sep-2024
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1588.0 keV 14 | S(n)= 6700.8 keV 3 | S(p)= 11463 keV 3 | Q(α)= -7601.1 keV 10 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 81As β- decay | B | 81Se IT decay (57.28 M) |
| C | 80Se(n,γ) E=THERMAL | D | 80Se(n,γ) E=RES |
| E | 80Se(pol d,p),(d,p) | F | 82Se(p,d) |
| G | 82Se(d,t) | H | 208Pb(18O,xγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0 | ABCDEFGH | 1/2- | 18.5 m 1 % β- = 100 | |||||
| 102.968 10 | ABC EF H | 7/2+ | 57.28 m 2 % IT = 99.913 15 % β- = 0.087 15 | 102.968 10 | 100 | E3(+M4) | 0 | 1/2- |
| 294.19 18 | C EFGH | 9/2+ | 190.83 23 | 100 | 102.968 | 7/2+ | ||
| 467.75 9 | A CDEFG | 3/2- | 467.74 15 | 100 | 0 | 1/2- | ||
| 491.05 10 | A C FG | (5/2-) | 388.2 2 491.28 15 | 10.6 8 100.0 12 | (E2) | 102.968 0 | 7/2+ 1/2- | |
| 615.6 5 ? | C | 126 1 ? 148 1 ? | | 491.05 467.75 | (5/2-) 3/2- | |||
| 624.10 12 | A C EFG | 5/2- | 156.1 2 521.1 2 | 20.3 29 100 10 | [M1,E2] | 467.75 102.968 | 3/2- 7/2+ | |
| 782 25 | F | 7/2+,9/2+ | ||||||
| 889.41 20 | C | (3/2+,5/2,7/2+) | 264.8 3 399.8 6 786.4 4 889 1 ? | 29 7 ≤32 100 27 125 | 624.10 491.05 102.968 0 | 5/2- (5/2-) 7/2+ 1/2- | ||
| 1052.73 13 | A C EFG | 5/2+ | 757.6 3 949.68 20 | 100 12 <298 | 294.19 102.968 | 9/2+ 7/2+ | ||
| 1059.0 3 | H | (11/2+) | 764.7 3 | 100 | 294.19 | 9/2+ | ||
| 1109 25 | F | 3/2+,5/2+ | ||||||
| 1232.79 22 | C E | 1/2+ | 765.04 20 1232.7 | 100 8 ≤25 | 467.75 0 | 3/2- 1/2- | ||
| 1303.41 16 | A C EFG | 5/2+ | 812.5 6 835.92 20 1201.0 10 | ≤29 100 11 36 27 | 491.05 467.75 102.968 | (5/2-) 3/2- 7/2+ | ||
| 1373.0 3 | H | (13/2+) | 313.9 3 1078.9 2 | 37 7 100 10 | 1059.0 294.19 | (11/2+) 9/2+ | ||
| 1406.28 14 | A C EFG | 3/2- | 915.0 2 938.8 2 1406.1 3 | 9.5 20 28.8 31 100.0 12 | 491.05 467.75 0 | (5/2-) 3/2- 1/2- | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 1628 25 | F | 1/2-,3/2- | ||||||
| 1702.5 3 | C E | 3/2+ | 399.8 6 649.5 5 812.5 6 1087.2 4 1210.8 10 1599.5 5 1702.2 10 | ≤26 24 6 ≤46 ≤43 100 57 50 6 47 16 | 1303.41 1052.73 889.41 615.6 491.05 102.968 0 | 5/2+ 5/2+ (3/2+,5/2,7/2+) (5/2-) 7/2+ 1/2- | ||
| 1711.25 21 | C | (5/2-,1/2-,3/2) | 1087.2 4 1243.54 25 1711.0 6 | ≤45 100 9 83 12 | 624.10 467.75 0 | 5/2- 3/2- 1/2- | ||
| 1724.99 15 | CD F | (3/2)+ | 491.33? 672.19 25 1232.7 1257.14 20 1725.4 3 | ≤10 ≤9.5 ≤6.6 18.8 15 100 8 | 1232.79 1052.73 491.05 467.75 0 | 1/2+ 5/2+ (5/2-) 3/2- 1/2- | ||
| 1812 25 | F | 7/2+,9/2+ | ||||||
| 1828.1 3 | C E | 3/2+ | 938.7 3 1360.7 10 1828.1 4 | ≤10 62 13 100 13 | 889.41 467.75 0 | (3/2+,5/2,7/2+) 3/2- 1/2- | ||
| 2029.65 15 | A EF | 1/2-,3/2- | 1561.9 2 2029.6 2 | 100 11 60 5 | 467.75 0 | 3/2- 1/2- | ||
| 2150 25 | F | 1/2-,3/2- | ||||||
| 2173.9 5 | C EF | 1549.4 7 1706.6 7 | 58 10 100 12 | 624.10 467.75 | 5/2- 3/2- | |||
| 2179.32 17 | A EF | 1688.4 2 | 100 | 491.05 | (5/2-) | |||
| 2252.96 23 | C | (5/2+) | 949.65 25 1627.1 10 1636.2 8 1784.8 8 1959.5 5 2149.6 8 | ≤156 31 6 42 8 100 27 47 8 ≤45 | 1303.41 624.10 615.6 467.75 294.19 102.968 | 5/2+ 5/2- 3/2- 9/2+ 7/2+ | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2282 25 | F | 1/2-,3/2- | ||||||
| 2333.07 20 | A C EF | 5/2+ | 1842.1 2 1864.9 4 2332.3 2 | 54 9 100 11 58 9 | 491.05 467.75 0 | (5/2-) 3/2- 1/2- | ||
| 2383.4 3 | C | (5/2-,7/2,9/2-) | 672.19 25 1892.0 8 | ≤233 100 21 | 1711.25 491.05 | (5/2-,1/2-,3/2) (5/2-) | ||
| 2475 25 | F | |||||||
| 2532 | EF | (5/2)+ | ||||||
| 2568.8 9 | C | (1/2,3/2) | 1162.0 10 2570.0 15 | 51 22 100 15 | 1406.28 0 | 3/2- 1/2- | ||
| 2569.97 13 | A | (1/2-,3/2-,5/2-) | 2079.3 2 2102.2 2 2569.5 2 | 18.6 27 100 11 47 5 | 491.05 467.75 0 | (5/2-) 3/2- 1/2- | ||
| 2596 | EF | 1/2-,3/2- | ||||||
| 2659.65 20 | A EF | (5/2)- | 2659.6 2 | 100 | 0 | 1/2- | ||
| 2691.3 4 | H | (15/2+,17/2+) | 1318.2 3 | 100 | 1373.0 | (13/2+) | ||
| 2734 | E | |||||||
| 2769.76 17 | A F | (5/2-) | 2145.8 2 2301.8 2 | 20 4 100 10 | 624.10 467.75 | 5/2- 3/2- | ||
| 2773.6 5 | C EF | 5/2+ | 1367.2 10 1884.2 5 2149.6 8 | 66 10 100 12 <80 | 1406.28 889.41 624.10 | 3/2- (3/2+,5/2,7/2+) 5/2- | ||
| 2832.2 5 | H | (17/2-) | 140.9 2 | 100 | 2691.3 | (15/2+,17/2+) | ||
| 2891 | EF | (7/2+,9/2+) | ||||||
| 2935.17 14 | A F | (5/2)- | 756.0 2 1882.0 2 2832.4 2 | 61 7 <3 100 11 | 2179.32 1052.73 102.968 | 5/2+ 7/2+ | ||
| 2938 | E | (1/2+) | ||||||
| 2953.4 20 | C | 1/2,3/2,5/2+ | 2485.6 20 | 100 | 467.75 | 3/2- | ||
| 2965.08 19 | A F | (5/2-) | 1661.8 2 2340.8 2 | 100 15 59 9 | 1303.41 624.10 | 5/2+ 5/2- | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2985 25 | F | (7/2+,9/2+) | ||||||
| 2986 | E | (1/2+) | ||||||
| 3053 6 | EF | 3/2+ | ||||||
| 3093 | E | |||||||
| 3150 25 | F | (-) | ||||||
| 3208 | E | |||||||
| 3222.7 16 ? | A EF | (5/2)- | 2733.3 2 ? 3118.2 2 ? | 100 15 38 10 | 491.05 102.968 | (5/2-) 7/2+ | ||
| 3287 | EF | |||||||
| 3308 | E | |||||||
| 3349 25 | F | 1/2-,3/2- | ||||||
| 3379 | E | |||||||
| 3411 | E | |||||||
| 3435 | E | |||||||
| 3477 | E | |||||||
| 3525.7 11 | C E | 1/2,3/2,5/2+ | ||||||
| 3562 | E | |||||||
| 3682 | E | 3/2+ | ||||||
| 3774 | E | 3/2+,5/2+ | ||||||
| 3801.1 | H | 968.9 4 | 100 | 2832.2 | (17/2-) | |||
| 3830 | E | 1/2+ | ||||||
| 3920? | E | (1/2+) | ||||||
| 3970? | E | (1/2+) | ||||||
| 4095 | E | |||||||
| 4137 | E | |||||||
| 4164 | E | |||||||
| 4215 | E | (3/2+,5/2+) | ||||||
| 4260 | E | (3/2+,5/2+) | ||||||
| 4437 | E | |||||||
| 4559 | E | |||||||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 4656 | E | |||||||
| 4708 | E | |||||||
| 4845 | E | |||||||
| 4958 | E | |||||||
| 5080 | E | |||||||
| 5180? | E | |||||||
| 5330? | E | |||||||
E(level): From a least-squares fit to Eγ if ΔE<1 keV; from (p,d) if ΔE=25 keV; from (pol d,p) otherwise. Based on a comparison with E(level) derived from Eγ data for E(level)<3550, E(level) data from 1978Mo12 and 1960Ca16 in (d,p) are reliable to better than 6 keV (typically 0-2 keV), with the exception of the 635 level (which is 11 keV high). For E(level)>1400, E(level) values from (p,d) are 10-30 keV higher than those from (d,p). The evaluator, therefore, adopts E(level) from (d,p) in preference to E(level) from (p,d).
Jπ(level): From (pol d,p), unless noted otherwise. From DWBA analysis of angular distribution and vector analyzing power (1978Mo12).
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - Yrast sequence | |||||||
| 102.968 10 | 7/2+ | 57.28 m 2 % IT = 99.913 15 % β- = 0.087 15 | |||||
| 294.19 18 | 9/2+ | 190.83 23 | 100 | 102.968 | 7/2+ | ||
| 1059.0 3 | (11/2+) | 764.7 3 | 100 | 294.19 | 9/2+ | ||
| 1373.0 3 | (13/2+) | 313.9 3 1078.9 2 | 37 7 100 10 | 1059.0 294.19 | (11/2+) 9/2+ | ||
| 2691.3 4 | (15/2+,17/2+) | 1318.2 3 | 100 | 1373.0 | (13/2+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
| 102.968 | 7/2+ | 57.28 m 2 % IT = 99.913 15 % β- = 0.087 15 | 102.968 10 | E3(+M4) | 0.0056 LT | 6.80 | B(E3)(W.u.)=9.47E-4 13, α=6.80 10, α(K)=5.30 7, α(L)=1.286 18, α(M)=0.2006 28, α(N)=0.01349 19 |
| 491.05 | (5/2-) | 491.28 15 | (E2) | 0.00291 | α=0.00291 4, α(K)=0.00258 4, α(L)=0.000279 4, α(M)=4.33×10-5 6, α(N)=3.64E-6 5 | ||
| 624.10 | 5/2- | 156.1 2 | [M1,E2] | 0.09 | α=0.09 6, α(K)=0.08 6, α(L)=0.010 7, α(M)=0.0015 11, α(N)=1.2×10-4 8 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 102.968 | 7/2+ | 57.28 m 2 % IT = 99.913 15 % β- = 0.087 15 | %ε+%β+ deduced by the evaluator using data of 81Se IT decay and β- decay (57.28 m). See 81Se β- decay (57.28 m) dataset. E(level): %ε+%β+ deduced by the evaluator using data of 81Se IT decay and β- decay (57.28 m). See 81Se β- decay (57.28 m) dataset. From (18O,xγ). Yrast sequence. |
| 294.19 | 9/2+ | E(level): From (18O,xγ). Yrast sequence. | |
| 624.10 | 5/2- | XREF: E(635). | |
| 1059.0 | (11/2+) | E(level): From (18O,xγ). Yrast sequence. Assumed to be of M1 (dipole) transition (by authors (18O,xγ)), based on the 1079γ crossover transition. Jπ(level): Based on the assumption (by authors in 2009Po04 (18O,xγ)) that in yrast decays spin values increase with excitation energy. See the dataset for other assumptions. | |
| 1373.0 | (13/2+) | E(level): From (18O,xγ). Yrast sequence. Assumed to be of M1 (dipole) transition (by authors (18O,xγ)), based on the 1079γ crossover transition. Jπ(level): Based on the assumption (by authors in 2009Po04 (18O,xγ)) that in yrast decays spin values increase with excitation energy. See the dataset for other assumptions. | |
| 2029.65 | 1/2-,3/2- | XREF: E(2036)F(2056). | |
| 2532 | (5/2)+ | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 2596 | 1/2-,3/2- | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 2691.3 | (15/2+,17/2+) | E(level): From (18O,xγ). Yrast sequence. Assumed to be of M1 (dipole) transition (by authors (18O,xγ)), based on the 1079γ crossover transition. Jπ(level): Based on the assumption (by authors in 2009Po04 (18O,xγ)) that in yrast decays spin values increase with excitation energy. See the dataset for other assumptions. | |
| 2734 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 2769.76 | (5/2-) | Jπ(level): L(p,d)=(2+3) for 2763 25 state. Evaluator assumes this to be 2770+2774 doublet, in which case the L=(2) component would correspond to the 2774 level, leaving the L=(3) component to correspond to the 2770 level, thus favoring Jπ=5/2-,7/2- for it. | |
| 2832.2 | (17/2-) | E(level): Assumed to be of M1 (dipole) transition (by authors (18O,xγ)), based on the 1079γ crossover transition. Jπ(level): Based on the assumption (by authors in 2009Po04 (18O,xγ)) that in yrast decays spin values increase with excitation energy. See the dataset for other assumptions. | |
| 2891 | (7/2+,9/2+) | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. From 81As β- decay. Jπ(level): L(p,d)=(3+4) for 2893 25 state. Evaluator assumes this to be 2891+2935 doublet, in which case the L=(3) component would correspond to the 2935 level leaving the L=(4) component to correspond to the 2891 level, favoring Jπ=7/2+,9/2+ for this level. | |
| 2935.17 | (5/2)- | E(level): From 81As β- decay. Jπ(level): L(p,d)=(3+4) for 2893 25 state. Evaluator assumes this to be 2891+2935 doublet, in which case the L=(3) component would correspond to the 2935 level leaving the L=(4) component to correspond to the 2891 level, favoring Jπ=7/2+,9/2+ for this level. | |
| 2938 | (1/2+) | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 2965.08 | (5/2-) | XREF: F(2985). E(level): From (18O,xγ). Jπ(level): L(p,d)=(3+4) for 2985 25 state. Evaluator assumes this to be a doublet, in which case the L=(3) component could correspond to the 2965 level leaving the L=(4) component to correspond to an E≈2986 level and favoring Jπ=7/2+,9/2+ for this level. The L(d,p)=(0) state at E=2986 is then presumed to be a different level. | |
| 2985 | (7/2+,9/2+) | E(level): From (18O,xγ). Jπ(level): L(p,d)=(3+4) for 2985 25 state. Evaluator assumes this to be a doublet, in which case the L=(3) component could correspond to the 2965 level leaving the L=(4) component to correspond to an E≈2986 level and favoring Jπ=7/2+,9/2+ for this level. The L(d,p)=(0) state at E=2986 is then presumed to be a different level. | |
| 2986 | (1/2+) | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 3053 | 3/2+ | XREF: F(3087). E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 3093 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3150 | (-) | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 3208 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3287 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3308 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3349 | 1/2-,3/2- | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 3379 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3411 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3435 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3477 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3562 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 3682 | 3/2+ | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 3774 | 3/2+,5/2+ | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 3830 | 1/2+ | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 4095 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 4137 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 4164 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 4215 | (3/2+,5/2+) | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 4260 | (3/2+,5/2+) | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | |
| 4437 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 4559 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 4656 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 4708 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 4845 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 4958 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. | ||
| 5080 | E(level): Estimated ΔE≈6 keV from level energy deviations of (d,p) dataset from adopted values by more than 6 keV. |
| E(level) | E(gamma) | Comments |
| 294.19 | 190.83 | E(γ): weighted average of 191.05 20 from (n,γ) E=thermal and 190.6 2 from (18O,Xγ) |
| 491.05 | 388.2 | E(γ): weighted average of 388.1 2 from 81As β- decay and 388.4 3 from (n,γ) E=thermal I(γ): weighted average of 10.1 12 from 81As β- decay and 10.8 8 from (n,γ) E=thermal M(γ): L|<2 from RUL and 40Ns coin resolving time in (n,γ) E=thermal. Mult.=M2 implies T1/2(491 level)>17 ns if B(M2)(W.u.)<1, so is unlikely. If T1/2(491 level)>40 ns, B(E2)(W.u.)<0.007 (also unlikely). | 491.28 | E(γ): weighted average of 491.2 2 from 81As β- decay and 491.33 15 from (n,γ) E=thermal I(γ): From 81As β- decay. M(γ): d,E2 from RUL and 40Ns coin resolving time in (n,γ) E=thermal; ΔJ>1 from level scheme. |
| 624.10 | 156.1 | E(γ): weighted average of 156.0 2 from 81As β- decay and 156.4 3 from (n,γ) E=thermal I(γ): From 81As β- decay. M(γ): M1,E2 expected for 5/2- to 3/2- transition. | 521.1 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. |
| 889.41 | 399.8 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 1052.73 | 949.68 | E(γ): weighted average of 949.7 2 from 81As β- decay and 949.65 25 from (n,γ) E=thermal I(γ): for doublet in (n,γ) E=thermal; undivided Iγ given. Only this branch is reported in β- decay. |
| 1059.0 | 764.7 | E(γ): Assumed to be of M1 (dipole) transition (by authors (18O,xγ)), based on the 1079γ crossover transition.. From (18O,xγ) |
| 1232.79 | 1232.7 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 1303.41 | 812.5 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity | 835.92 | E(γ): weighted average of 836.1 2 from 81As β- decay and 835.74 20 from (n,γ) E=thermal |
| 1373.0 | 313.9 | E(γ): From (18O,xγ). Assumed to be of M1 (dipole) transition (by authors (18O,xγ)), based on the 1079γ crossover transition. I(γ): From (18O,xγ) | 1078.9 | E(γ): From (18O,xγ) I(γ): From (18O,xγ) |
| 1406.28 | 915.0 | E(γ): weighted average of 915.0 2 from 81As β- decay and 915.4 6 from (n,γ) E=thermal I(γ): weighted average of 10.2 20 from 81As β- decay and 7.7 31 from (n,γ) E=thermal | 938.8 | E(γ): weighted average of 938.9 2 from 81As β- decay and 938.7 3 from (n,γ) E=thermal I(γ): weighted average of 33 6 from 81As β- decay and 27.7 31 from (n,γ) E=thermal | 1406.1 | E(γ): weighted average of 1406.0 2 from 81As β- decay and 1406.7 4 from (n,γ) E=thermal I(γ): From 81As β- decay. |
| 1702.5 | 399.8 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity | 812.5 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity | 1087.2 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 1711.25 | 1087.2 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 1724.99 | 672.19 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity | 1232.7 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 2029.65 | 1561.9 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. | 2029.6 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. |
| 2179.32 | 1688.4 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. |
| E(level) | E(gamma) | Comments |
| 2252.96 | 2149.6 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 2333.07 | 1842.1 | E(γ): weighted average of 1842.1 2 from 81As β- decay and 1841.9 5 from (n,γ) E=thermal I(γ): weighted average of 61 9 from 81As β- decay and 46 9 from (n,γ) E=thermal | 1864.9 | E(γ): unweighted average of 1864.5 2 from 81As β- decay and 1865.3 3 from (n,γ) E=thermal I(γ): weighted average of 100 11 from 81As β- decay and 100 12 from (n,γ) E=thermal | 2332.3 | E(γ): reported only in β- decay; placement implies mult=M2, see comments with the level for Jπ.. From 81As β- decay. I(γ): From 81As β- decay. |
| 2383.4 | 672.19 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 2569.97 | 2079.3 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. | 2102.2 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. | 2569.5 | E(γ): could be same as 2570γ in (n,γ) E=thermal or could be doublet deexciting both 2569 and 2570 levels.. From 81As β- decay. I(γ): From 81As β- decay. |
| 2659.65 | 2659.6 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. |
| 2691.3 | 1318.2 | E(γ): From (18O,xγ) |
| 2769.76 | 2145.8 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. | 2301.8 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. |
| 2773.6 | 2149.6 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 2832.2 | 140.9 | E(γ): From (18O,xγ) |
| 2935.17 | 756.0 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. | 1882.0 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. | 2832.4 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. |
| 2965.08 | 1661.8 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. | 2340.8 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. |
| 3222.7 | 2733.3 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. | 3118.2 | E(γ): From 81As β- decay. I(γ): From 81As β- decay. |
| 3801.1 | 968.9 | E(γ): From (18O,xγ) |
Other Reactions:
2H(80Se,pγ), E(80Se)≈320 MeV (2007Ci05); investigated feasibility of measuring γ-rays in coincidence with (d,p) reaction protons in inverse kinematics using Cd2 targets; observed 765γ-468γ cascade and 1233γ from 1233 level.
2015Al19: Isotopic yield cross section σ(81Se)=0.011 mb 3, in spallation of 136Xe-induced reactions on deuterium at 500 MeV/nucleon.
Q-value: S(2n)=16614.2 10, S(2p)=21440 40 (2021Wa16)