ADOPTED LEVELS, GAMMAS for 190W
Authors: Balraj Singh, and Jun Chen | Citation: Nucl. Data Sheets 169, 1 (2020) | Cutoff date: 15-Oct-2020
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1200 keV 40 | S(n)= 6840 keV 60 | S(p)= 9840 keV SY | Q(α)= -380 keV 60 | ||
| Reference: 2017WA10 |
| References: | |||
| A | 190Ta β- decay (5.3 S) | B | 190W IT decay (111 NS) |
| C | 190W IT decay (166 μs) | D | 192Os(136Xe,xγ),186W(136Xe,xγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | ABCD | 0+ | 30.0 m 15 % β- = 100 | |||||
| 206.8 5 | ABCD | (2+) | 206.8 5 | 100 | [E2] | 0.0 | 0+ | |
| 453.9 8 | A | (2+) | 247 454 | 100 25 40 20 | [E2+M1] [E2] | 206.8 0.0 | (2+) 0+ | |
| 565.1 7 | ABCD | (4+) | 358.3 5 | 100 | [E2] | 206.8 | (2+) | |
| 1049.4 9 | BCD | (6+) | 484.3 5 | 100 | [E2] | 565.1 | (4+) | |
| 1642.2 12 | BCD | (8+) | 593.6 11 | 100 | [E2] | 1049.4 | (6+) | |
| 1743.6 10 | BCD | (8+) | 111 ns 17 % IT = 100 | 102 694.0 5 | 4.8 11 100 2 | (M1) [E2] | 1642.2 1049.4 | (8+) (6+) |
| 1840.6 14 | CD | (10-) | 166 µs 6 % IT = 100 | 97 | 100 | M2 | 1743.6 | (8+) |
| 2067.6 14 | D | (9+) | 324 | | 1743.6 | (8+) | ||
| 2318.2 16 | D | (10+) | 676 | | 1642.2 | (8+) | ||
| 2423.6 18 | D | (10+) | 356 | | 2067.6 | (9+) | ||
| 2655.2 19 | D | (12+) | 337 | | 2318.2 | (10+) | ||
E(level): From least-squares fit to γ-ray energies, assuming 1 keV uncertainty for Eγ when not stated.
Jπ(level): From systematics of even-even nuclei up to 1641, (8+), and band assignment for higher positive-parity levels. For (10-) level, the assignment is from (M2) transition to 1742, (8+) level
T1/2(level): isomer and half-life proposed by 2011St21
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - g.s. band | |||||||
| 0.0 | 0+ | 30.0 m 15 % β- = 100 | |||||
| 206.8 5 | (2+) | 206.8 5 | 100 | [E2] | 0.0 | 0+ | |
| 565.1 7 | (4+) | 358.3 5 | 100 | [E2] | 206.8 | (2+) | |
| 1049.4 9 | (6+) | 484.3 5 | 100 | [E2] | 565.1 | (4+) | |
| 1642.2 12 | (8+) | 593.6 11 | 100 | [E2] | 1049.4 | (6+) | |
| 2318.2 16 | (10+) | 676 | | 1642.2 | (8+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - Kπ=8+, ν9/2[505]~#ν7/2[503] | |||||||
| 1743.6 10 | (8+) | 111 ns 17 % IT = 100 | |||||
| 2067.6 14 | (9+) | 324 | | 1743.6 | (8+) | ||
| 2423.6 18 | (10+) | 356 | | 2067.6 | (9+) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 206.8 | (2+) | 206.8 5 | [E2] | 0.275 | α=0.275 | |
| 453.9 | (2+) | 247 | [E2+M1] | 0.26 | α=0.26 11 | |
| (2+) | 454 | [E2] | 0.0268 | α=0.0268 | ||
| 565.1 | (4+) | 358.3 5 | [E2] | 0.0510 | α=0.0510 | |
| 1049.4 | (6+) | 484.3 5 | [E2] | 0.0227 | α=0.0227 | |
| 1642.2 | (8+) | 593.6 11 | [E2] | 0.01387 | α=0.01387 | |
| 1743.6 | (8+) | 111 ns 17 % IT = 100 | 102 | (M1) | 4.49 | B(M1)(W.u.)=7.0×10-6 +32-23, α=4.49 |
| (8+) | 111 ns 17 % IT = 100 | 694.0 5 | [E2] | 0.00972 | B(E2)(W.u.)=3.8E-4 +10-7, α=0.00972 | |
| 1840.6 | (10-) | 166 µs 6 % IT = 100 | 97 | M2 | 48.1 | B(M2)(W.u.)=0.0134 9, α=48.1 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 0+ | 30.0 m 15 % β- = 100 | E(level): g.s. band. |
| 206.8 | (2+) | E(level): g.s. band. | |
| 565.1 | (4+) | E(level): g.s. band. | |
| 1049.4 | (6+) | E(level): g.s. band. | |
| 1642.2 | (8+) | E(level): g.s. band. | |
| 1743.6 | (8+) | 111 ns 17 % IT = 100 | Configuration=ν9/2[505]~#ν7/2[503], Kπ=8+ (2010La16,2009Fa06). E(level): Kπ=8+, ν9/2[505]~#ν7/2[503]. |
| 1840.6 | (10-) | 166 µs 6 % IT = 100 | Configuration=ν9/2[505]~#ν11/2[615], Kπ=10- (2010La16,2005Ca02,2000Po26). |
| 2067.6 | (9+) | E(level): Kπ=8+, ν9/2[505]~#ν7/2[503]. | |
| 2318.2 | (10+) | E(level): g.s. band. | |
| 2423.6 | (10+) | E(level): Kπ=8+, ν9/2[505]~#ν7/2[503]. |
| E(level) | E(gamma) | Comments |
| 453.9 | 247 | E(γ): From 190Ta β- decay (5.3 s) I(γ): From 190Ta β- decay (5.3 s) | 454 | E(γ): From 190Ta β- decay (5.3 s) I(γ): From 190Ta β- decay (5.3 s) |
| 1743.6 | 102 | I(γ): From IT decay (166 μs) M(γ): M1 or E2 from α(exp) deduced from γ-ray intensity balance in 190W IT decay (111 ns) (2010La16) | 694.0 | I(γ): From IT decay (166 μs) |
| 1840.6 | 97 | E(γ): From IT decay (166 μs) M(γ): from α(exp) deduced from intensity balance arguments in 190W IT decay (166 μs) (2010La16) |
| 2067.6 | 324 | E(γ): From 192Os(136Xe,Xγ),186W(136Xe,Xγ) |
| 2318.2 | 676 | E(γ): From 192Os(136Xe,Xγ),186W(136Xe,Xγ) |
| 2423.6 | 356 | E(γ): From 192Os(136Xe,Xγ),186W(136Xe,Xγ) |
| 2655.2 | 337 | E(γ): From 192Os(136Xe,Xγ),186W(136Xe,Xγ) |
Other measurements:
1976Ha39: 190W produced and identified in 192Os(n,p2n),E=25-200 MeV and 192Os(p,3p),E=92 MeV reactions
Mass measurement: 2013Sh30, Schottky mass spectrometry (SMS) technique using FRS-ESR facility at GSI
Theory references: consult the NSR database (www.nndc.bnl.gov/nsr/) for about 25 primary references dealing with nuclear structure calculations.
Levels: An isomer at unknown energy with T1/2=0.35 μs 4 was proposed by 2011St21 from their gamma-ray data, with half-life from decay curve of delayed W x-rays in 9Be(209Pb,X),E=1 GeV/nucleon reaction, and assigned as possible 0+ to 0+ shape-changing transition. Evaluators treat the existence of this isomer as uncertain, as no confirmation is provided in other studies.
Q-value: Estimated uncertainty=200 for S(p) (2017Wa10)
Q-value: S(2n)=11860 40, S(2p)=18080 300 (syst) (2017Wa10)