ADOPTED LEVELS, GAMMAS for 81As
Author: Coral M. Baglin | Citation: Nucl. Data Sheets 109, 2257 (2008) | Cutoff date: 15-Aug-2008
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=3856 keV 3 | S(n)= 8390 keV 5 | S(p)= 10287 keV 4 | Q(α)= -8966 keV 4 | ||
Reference: 2012WA38 |
References: | |||
A | 81Ge β- decay (7.6 S): (1/2+) | B | 82Se(t,α) |
C | 82Se(d,3He) | D | 81Ge β- decay (7.6 S): (9/2+) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0 | ABCD | 3/2- | 33.3 s 8 % β- = 100 | |||||
93.10 5 | A CD | 1/2-,3/2-,5/2- | 93.10 10 | 100 | M1+E2 | 0 | 3/2- | |
290.40 4 | ABCD | (3/2)- | 197.30 5 290.35 5 | 100 7 52 5 | (M1) | 93.10 0 | 1/2-,3/2-,5/2- 3/2- | |
335.96 4 | ABCD | (5/2)- | < 0.7 ns | 242.84 9 335.98 5 | 4.1 5 100 4 | M1,E2 | 93.10 0 | 1/2-,3/2-,5/2- 3/2- |
737.72 4 | ABCD | (5/2-) | 401.75 5 737.74 5 | 35 3 100 6 | 335.96 0 | (5/2)- 3/2- | ||
757 9 | B | 7/2+,9/2+ | ||||||
758.42 7 | AB D | (3/2+,5/2-) | 467.98 6 665.9 3 758.5 6 | 46 13 38 100 9 | 290.40 93.10 0 | (3/2)- 1/2-,3/2-,5/2- 3/2- | ||
864.27 15 | A | 771.26 15 | 100 | 93.10 | 1/2-,3/2-,5/2- | |||
1015 4 | BC | 1/2-,3/2- | ||||||
1042.00 7 | AB D | (7/2-) | 706.07 10 751.51 10 | 90 7 100 7 | 335.96 290.40 | (5/2)- (3/2)- | ||
1083.39 9 | D | (3/2+,5/2,7/2-) | 747.41 10 793.0 990.3 4 1083.2 3 | 100 7 68 19 10 39 10 | 335.96 290.40 93.10 0 | (5/2)- (3/2)- 1/2-,3/2-,5/2- 3/2- | ||
1128.98 8 | B D | (7/2,9/2-) | 391.34 11 792.94 6 | 6.9 6 100 | 737.72 335.96 | (5/2-) (5/2)- | ||
1195.04 9 | D | 859.13 10 | 100 | 335.96 | (5/2)- | |||
1496 5 | BC | 1/2-,3/2- | ||||||
1613.55 10 | D | 875.84 10 | 100 | 737.72 | (5/2-) | |||
1614 4 ? | BC | 1/2+ | ||||||
1672 4 | BC | (5/2-,7/2-) | ||||||
1870.0 4 | A | (1/2,3/2) | 1005.7 3 1869.8 | 53 13 100 | 864.27 0 | 3/2- | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1879 8 | B | 7/2+,9/2+ | ||||||
1914.95 15 | D | (7/2,9/2-) | 1156.41 15 | 100 | 758.42 | (3/2+,5/2-) | ||
2077 13 | B | (-) | ||||||
2142.10 10 | D | (7/2+,9/2+) | 1013.0 2 1058.6 2 1100.3 2 | 100 8 38.1 22 24 3 | 1128.98 1083.39 1042.00 | (7/2,9/2-) (3/2+,5/2,7/2-) (7/2-) | ||
2250.87 23 | D | 637.3 3 | 100 | 1613.55 | ||||
≈2518? | B | |||||||
2624.53 7 | D | (7/2+) | 482.4 1 709.1 3 1429.53 10 1495.53 5 1582.27 15 1886.8 2 | 39 4 23 5 40.4 21 100 3 31.8 21 5.7 7 | 2142.10 1914.95 1195.04 1128.98 1042.00 737.72 | (7/2+,9/2+) (7/2,9/2-) (7/2,9/2-) (7/2-) (5/2-) | ||
2723 9 | B | 1/2-,3/2- | ||||||
2758.28 9 | D | (7/2+,9/2+,11/2+) | 133.70 6 507.4 3 616.3 2 1144.75 15 1629.45 13 | 54 3 17 4 23 4 100 7 57 4 | 2624.53 2250.87 2142.10 1613.55 1128.98 | (7/2+) (7/2+,9/2+) (7/2,9/2-) | ||
2862.47 17 | A | (1/2-,3/2) | 2103.9 3 2526.5 2 | 69 10 100 10 | 758.42 335.96 | (3/2+,5/2-) (5/2)- | ||
2912.07 16 | A | (3/2-) | 1869.8 2174.32 15 | 23.3 100 7 | 1042.00 737.72 | (7/2-) (5/2-) | ||
2965.92 10 | D | (7/2+) | 1352.3 1882.51 8 2207.5 3 2228.2 5 2629.9 2 | 5.4 100 4 16.3 22 10.9 22 32 3 | 1613.55 1083.39 758.42 737.72 335.96 | (3/2+,5/2,7/2-) (3/2+,5/2-) (5/2-) (5/2)- | ||
2999 3 | B | 1/2-,3/2- | ||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
3098 6 | B | 5/2-,7/2- | ||||||
3136.27 13 | A | (3/2+) | 2377.4 4 2800.2 2 2845.8 2 3136.6 3 | 60 18 100 11 49 7 29 5 | 758.42 335.96 290.40 0 | (3/2+,5/2-) (5/2)- (3/2)- 3/2- | ||
3195.44 19 | A | (3/2+) | 2331.3 2 2436.6 2859.1 2904.7 3 3195.1 | 85 9 ≈18.9 ≈18.9 35 6 100 | 864.27 758.42 335.96 290.40 0 | (3/2+,5/2-) (5/2)- (3/2)- 3/2- | ||
3290.4 | D | (7/2+,9/2+,11/2+) | 665.9 | 100 | 2624.53 | (7/2+) | ||
3306 9 | B | |||||||
3368.4 3 | A | (1/2,3/2) | 456.3 2 | 100 | 2912.07 | (3/2-) | ||
3480 7 | B | 1/2+ | ||||||
3531.1 10 | A | (1/2-,3/2) | 3195.1 | 100 | 335.96 | (5/2)- | ||
3562.73 15 | A | (1/2+,3/2+) | 3469.5 2 3562.7 2 | 54 6 100 7 | 93.10 0 | 1/2-,3/2-,5/2- 3/2- | ||
3596 12 | B | 1/2+ | ||||||
3742 9 | B | |||||||
3818 12 | B | 1/2-,3/2- | ||||||
3914 8 | B | (1/2+,5/2-,7/2-) | ||||||
3995 7 | B | (1/2+,5/2-,7/2-) |
E(level): From least-squares fit to Eγ for levels deexcited by γ rays; from (t,α) for levels excited only in that reaction and weighted average from (t,α) and (d,3He) for levels excited in those two reactions only.
Jπ(level): Note that many Jπ values are based on log ft values for β- decay from high and low spin isomers of 81Ge whose lifetimes are indistinguishable; the relevant decay schemes are highly tentative, and the deduced Jπ should be accepted with caution. The evaluator notes cases where inconsistent Jπ is implied by log ft and L(t,α) (defined only by 4-6 data points) for levels at similar energies.
I(γ): From 81Ge β- decay; Iγ data are taken from 1980HoZN for source containing both high and low spin isomers.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Mixing Ratio | Conversion Coefficient | Additional Data |
93.10 | 1/2-,3/2-,5/2- | 93.10 10 | M1+E2 | 0.24 6 | 0.16 | α=0.16 3 | |
290.40 | (3/2)- | 197.30 5 | (M1) | 0.01490 | α=0.01490 | ||
335.96 | (5/2)- | < 0.7 ns | 335.98 5 | M1,E2 | 0.007 | α=0.007 3 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
1128.98 | (7/2,9/2-) | E(level): Doublet in (t,α). | |
2077 | (-) | E(level): Doublet in (t,α). | |
3306 | E(level): Doublet in (t,α). | ||
3596 | 1/2+ | E(level): Doublet in (t,α). |
E(level) | E(gamma) | Comments |
290.40 | 197.30 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. | 290.35 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. |
335.96 | 242.84 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. | 335.98 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. |
737.72 | 401.75 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. | 737.74 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. |
758.42 | 467.98 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. | 665.9 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. | 758.5 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. |
1042.00 | 706.07 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. | 751.51 | E(γ): Doublet in (t,α). I(γ): From 81Ge β- decay (7.6 s): (9/2+). Data from 81Ge β- decay (7.6 s): (1/2+) are consistent. |
1870.0 | 1869.8 | E(γ): Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
2912.07 | 1869.8 | E(γ): Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
3195.44 | 3195.1 | E(γ): Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
3531.1 | 3195.1 | E(γ): Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
Other Reactions:
238U(82Se,X), E=505 MeV (2005Lu07); measured γ spectrum from 81As reaction product (no details given).
82Se(μ,νnγ) (2008Zi03, 2006Eg04); measured muon lifetime and capture rate for 82Se; observed 336γ from 81As.
Q-value: Note: Current evaluation has used the following Q record 3856 5 8445 24 10287 4 -8966 6 2003Au03,2008Ha23
Q-value: S(p) from mass data for 81As and 80Ge (2008Ha23); S(p)=10307 29 from 2003Au03.