ADOPTED LEVELS, GAMMAS for 194Os
Authors: Jun Chen and Balraj Singh | Citation: Nucl. Data Sheets 177, 1 (2021) | Cutoff date: 3-Sep-2021
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=96.6 keV 20 | S(n)= 7112 keV 3 | S(p)= 9490 keV 40 | Q(α)= -490 keV 40 | ||
Reference: 2021WA16 |
References: | |||
A | 194Re β- decay:MIXED | B | 192Os(t,p) |
C | 192Os(18O,16OG) | D | 193Os(n,γ) E=THERMAL |
E | 198Pt(136Xe,xγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | ABCDE | 0+ | 6.0 y 2 % β- = 100 | |||||
218.509 6 | ABCDE | (2+) | 302 ps 50 | 218.511 6 | 100 | [E2] | 0.0 | 0+ |
601.7 4 | ABC E | (4+) | 383.3 4 | 100 | (E2) | 218.509 | (2+) | |
656.540 9 | BCD | (2+) | 438.034 8 656.526 16 | 53 8 100 | 218.509 0.0 | (2+) 0+ | ||
696.5 5 | ABC | 0+ | 477.8 5 | 100 | (E2) | 218.509 | (2+) | |
967.6 8 | C | (3+) | 749 | 100 | 218.509 | (2+) | ||
1063.2 6 | BC | (2+) | 366 845 1063 | 23 <41 100 | (E2) | 696.5 218.509 0.0 | 0+ (2+) 0+ | |
1090.5 7 | C | (4+) | 434 872 | 38 100 | (E2) | 656.540 218.509 | (2+) (2+) | |
1131.8 8 | A C E | (6+) | 530.1 6 | 100 | (E2) | 601.7 | (4+) | |
1140.5 10 | C | (4+) | 484 | 100 | (E2) | 656.540 | (2+) | |
1284.7 6 | C | (4+) | 221 317 684 1066 | 100 90 40 80 | (E2) | 1063.2 967.6 601.7 218.509 | (2+) (3+) (4+) (2+) | |
1311 5 | B | |||||||
1446.7 11 | C | (5+) | 845 | 100 | 601.7 | (4+) | ||
1466 5 | B | |||||||
1540 8 | B | 0+ | ||||||
1625.7 11 | C | (6+) | 1024 | 100 | 601.7 | (4+) | ||
1670.7 12 | BC | (5+) | 386 | 100 | 1284.7 | (4+) | ||
1737 8 | B | |||||||
1792.8 13 | C E | (8+) | 661 | 100 | (E2) | 1131.8 | (6+) | |
1835 8 | B | 0+ | ||||||
1878 8 | B | |||||||
1956 8 | B | |||||||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
2118 10 | B | |||||||
2168 10 | B | |||||||
X | A | |||||||
193.6+X 6 | A | 193.6 6 | 100 | X | ||||
542.6+X 7 | A | 349.0 3 | 100 | 193.6+X | ||||
1096.5+X 7 | A | 553.9 3 | 100 | 542.6+X | ||||
Y |
E(level): From a least-squares fit to Eγ values, assuming 1 keV uncertainty when not stated
M(γ): ΔJ=2, Q from γγ(DCO) in (18O,16Oγ) with E2 more probable than M2, assuming that level in bands have half-lives <50 ns or so, typical resolving time of γγ-coin systems
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - g.s. band | |||||||
0.0 | 0+ | 6.0 y 2 % β- = 100 | |||||
218.509 6 | (2+) | 302 ps 50 | 218.511 6 | 100 | [E2] | 0.0 | 0+ |
601.7 4 | (4+) | 383.3 4 | 100 | (E2) | 218.509 | (2+) | |
1131.8 8 | (6+) | 530.1 6 | 100 | (E2) | 601.7 | (4+) | |
1792.8 13 | (8+) | 661 | 100 | (E2) | 1131.8 | (6+) | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - Possible band based on (2+) | |||||||
656.540 9 | (2+) | ||||||
1140.5 10 | (4+) | 484 | 100 | (E2) | 656.540 | (2+) | |
1625.7 11 | (6+) | 1024 | 100 | 601.7 | (4+) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - Excited 0+ band | |||||||
696.5 5 | 0+ | ||||||
1063.2 6 | (2+) | 366 845 1063 | 23 <41 100 | (E2) | 696.5 218.509 0.0 | 0+ (2+) 0+ | |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 4 - Possible band based on (3+) | |||||||
967.6 8 | (3+) | ||||||
1284.7 6 | (4+) | 221 317 684 1066 | 100 90 40 80 | (E2) | 1063.2 967.6 601.7 218.509 | (2+) (3+) (4+) (2+) | |
1670.7 12 | (5+) | 386 | 100 | 1284.7 | (4+) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 5 - γ cascade | |||||||
X | |||||||
193.6+X 6 | 193.6 6 | 100 | X | ||||
542.6+X 7 | 349.0 3 | 100 | 193.6+X | ||||
1096.5+X 7 | 553.9 3 | 100 | 542.6+X |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
218.509 | (2+) | 302 ps 50 | 218.511 6 | [E2] | 0.247 | B(E2)(W.u.)=45 16, α=0.247 |
601.7 | (4+) | 383.3 4 | (E2) | 0.0454 | α=0.0454 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 0+ | 6.0 y 2 % β- = 100 | Quadrupole deformation parameter <β22>1/2=0.147 10 from isotope-shift measurement in 2020Ch33. E(level): Quadrupole deformation parameter <β22>1/2=0.147 10 from isotope-shift measurement in 2020Ch33. g.s. band. |
218.509 | (2+) | 302 ps 50 | E(level): g.s. band. |
601.7 | (4+) | E(level): g.s. band. | |
656.540 | (2+) | E(level): Possible band based on (2+). | |
696.5 | 0+ | E(level): Excited 0+ band. | |
967.6 | (3+) | E(level): Possible band based on (3+). | |
1063.2 | (2+) | E(level): Excited 0+ band. | |
1131.8 | (6+) | E(level): g.s. band. | |
1140.5 | (4+) | E(level): Possible band based on (2+). | |
1284.7 | (4+) | E(level): Possible band based on (3+). | |
1625.7 | (6+) | E(level): Possible band based on (2+). | |
1670.7 | (5+) | XREF: B(1668). E(level): Possible band based on (3+). | |
1792.8 | (8+) | E(level): g.s. band. | |
X | Jπ(level): Expected to be high-spin (J=10-12), if each level is fed directly in β- decay of 194Re, (11-) isomer. | ||
193.6+X | Jπ(level): Expected to be high-spin (J=10-12), if each level is fed directly in β- decay of 194Re, (11-) isomer. | ||
542.6+X | Jπ(level): Expected to be high-spin (J=10-12), if each level is fed directly in β- decay of 194Re, (11-) isomer. | ||
1096.5+X | Jπ(level): Expected to be high-spin (J=10-12), if each level is fed directly in β- decay of 194Re, (11-) isomer. | ||
Y | α high-spin isomer at high excitation is implied from out-of-beam γ-ray data in 186W,187Re,192Os(136Xe,Xγ),E=6 MeV/nucleon reaction studied by 2014DrZZ. The details of this work are not yet available. |
E(level) | E(gamma) | Comments |
218.509 | 218.511 | E(γ): other: 218.2 3 from 194Re β- decay (2012Al05). From curved-crystal data in 193Os(n,γ) |
601.7 | 383.3 | E(γ): From β- decay |
656.540 | 438.034 | E(γ): From curved-crystal data in 193Os(n,γ) I(γ): from 193Os(n,γ) E=thermal. Other: Iγ(438)/Iγ(656)=22/7 in 192Os(18O,16Oγ) is in severe disagreement with the value from 193Os(n,γ) | 656.526 | E(γ): From curved-crystal data in 193Os(n,γ) I(γ): from 193Os(n,γ) |
696.5 | 477.8 | E(γ): From β- decay |
967.6 | 749 | E(γ): a 749γ is placed by 2001Wh01 in (136Xe,Xγ) from a 2542 level, which is considered questionable and not adopted.. From 192Os(18O,16Oγ) M(γ): ΔJ=(1) from γγ(DCO) in (18O,16Oγ) |
1063.2 | 366 | E(γ): From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) | 845 | E(γ): Multiply placed. From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) | 1063 | E(γ): From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) |
1090.5 | 434 | E(γ): From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) | 872 | E(γ): From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) |
1131.8 | 530.1 | E(γ): From β- decay |
1140.5 | 484 | E(γ): From 192Os(18O,16Oγ) |
1284.7 | 221 | E(γ): From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) | 317 | E(γ): From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) | 684 | E(γ): From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) | 1066 | E(γ): From 192Os(18O,16Oγ) I(γ): From 192Os(18O,16Oγ) |
1446.7 | 845 | E(γ): Multiply placed. From 192Os(18O,16Oγ) |
1625.7 | 1024 | E(γ): From 192Os(18O,16Oγ) |
1670.7 | 386 | E(γ): From 192Os(18O,16Oγ) |
1792.8 | 661 | E(γ): same value in (136Xe,Xγ). From 192Os(18O,16Oγ) |
193.6+X | 193.6 | E(γ): From β- decay |
542.6+X | 349.0 | E(γ): From β- decay |
1096.5+X | 553.9 | E(γ): From β- decay |
194Os produced and identified by 1951Li19 in successive thermal neutron capture in 192Os target. Measured half-life of 700 d from decay curve of specific activity of iridium samples in equilibrium with 194Os.
Other measurements:
2011Be08: search for α decay of 198Pt to 194Os using a natural 42.5 g sample of Pt by detecting γ rays using a low-background HPGe detector in the underground conditions of Gran Sasso National Laboratories (LNGS) of the INFN (Italy) over 1815.4 hours. The background spectrum of the detector was also measured for 1045.6 hours. No evidence was found for α decay of 198Pt nuclide to g.s. and excited states of 194Os. Deduced T1/2>4.7×1017 y from observed counts=12|+9 of 328.5γ (from 194Ir decay, daughter of 194Os decay), reduced to <27 counts at 90% confidence level with partial half-life>4.7×1017 y for all levels in 194Os
2014DrZZ: 186W,187Re,192Os(136Xe,Xγ),E=6 MeV/nucleon, measured Eγ, Iγ, γγ-coin, in-beam and out-of-beam γ ray spectra using Gammasphere array at ATLAS-ANL facility. In-beam γ rays are reported at 219, 314, 383, 456, 530, 661 and 940 keV. Out-of-beam γ rays are reported at 194, 219, 314, 350, 383, 456, 530, 555, 661, 718 and 767 keV, implying a high-lying and high-spin isomer in 194Os, analogous to those in 192Os. In an alignment plot, the g.s. band was extended to 16+, and a Kπ=3- band was shown up to 13-. Contacted Greg Lane at ANU, May 29, 2019, for further information. His reply of May 29, 2019 mentioned that details of this work will be forthcoming sometime within a year or so.
Mass measurement: 2013Sh30
Theoretical structure references: consult the NSR database (www.nndc.bnl.gov/nsr/) for about 28 references dealing with nuclear structure calculations.
Q-value: S(2n)=12696 3, S(2p)=17390 200 (syst) (2021Wa16)