ADOPTED LEVELS, GAMMAS for 158Ta
Author: N. Nica | Citation: Nucl. Data Sheets 141, 1 (2017) | Cutoff date: 1-Feb-2017
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-7534 keV 358 | S(n)= 9645 keV 247 | S(p)= -448 keV 13 | Q(α)= 6124 keV 4 | ||
| S(2n)= 21448 keV 247 | S(2p)= 2045 keV 13 | Q(EC)= 10936 keV 197 | Q(ECp)= 7985 keV 196 | ||
| Reference: 2017WA10 | |||||
| References: | |||
| A | 158Ta IT decay:6.1 μs | B | 162Re α decay (107 MS) |
| C | 162Re α decay (77 MS) | D | 102Pd(58Ni,pnγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | B | (2-) | 55 ms 15 % ε ≈ 9 % α ≈ 91 | |||||
| 141 9 | A CD | (9+) | 36.7 ms 15 % ε = 5 5 % α = 95 5 | |||||
| 207.10 20 | A CD | (10+) | 66.1 2 | 100 | (M1) | 141 | (9+) | |
| 919.50 10 | A D | (11+) | 778.5 1 | 100 | (E2) | 141 | (9+) | |
| 923.2 8 ? | A D | 782.2 10 | 100 | 141 | (9+) | |||
| 953.40 22 | A D | (12+) | 33.9S 746.3 1 | 100 | (M1) (E2) | 919.50 207.10 | (11+) (10+) | |
| 1358.5 8 ? | A D | 435.3 1 | 100 | 923.2 | ||||
| 1391.88 24 | A D | 33.4S 438.5 1 | 100 | 1358.5 953.40 | (12+) | |||
| 1551.53 24 | A D | (14+) | 159.5 2 ? 598.1 1 | 2.0 2 100 | (E2) | 1391.88 953.40 | (12+) | |
| 1804.2 3 | A D | (16+) | 252.9 1 | 100 | (E2) | 1551.53 | (14+) | |
| 1824.92 25 | A D | 273.1 1 434? | 100 | 1551.53 1391.88 | (14+) | |||
| 2025.47 25 | A D | 200.2 2 474.0 1 633.7 2 | 10.0 6 39.8 11 100 8 | 1824.92 1551.53 1391.88 | (14+) | |||
| 2098.2 3 | A D | (16+) | 72.7S 273.1 1 | 100 | 2025.47 1824.92 | |||
| 2387.2 3 | A D | (17+) | 583.0 2 | 100 | (M1) | 1804.2 | (16+) | |
| 2601.6 3 | D | 503.3 1 797.6 2 | 100.0 13 31.5 15 | 2098.2 1804.2 | (16+) (16+) | |||
| 2805.5 4 | A D | (19-) | 6.1 µs 1 % IT = 98.6 2 % α = 1.4 2 | 418.5 7 708.1 9 1001.6 11 | 4.8 6 11.7 8 100 5 | (M2) (E3) (E3) | 2387.2 2098.2 1804.2 | (17+) (16+) (16+) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2853.8 4 | D | 466.6 2 | 100 | 2387.2 | (17+) | |||
| 2877.9 4 | D | 1052.5 3 1074.1 3 | 100 8 84 8 | 1824.92 1804.2 | (16+) | |||
| 2938.3 3 ? | D | 336.6 1 | 100 | 2601.6 | ||||
| 2959.7 3 | D | 357.9 2 572.6 3 861.4 2 | 100.0 17 5.2 13 39.2 13 | 2601.6 2387.2 2098.2 | (17+) (16+) | |||
| 3021.4 3 | D | 1217.5 2 | 100 | 1804.2 | (16+) | |||
| 3063.2 4 | D | 257.7 1 | 100 | 2805.5 | (19-) | |||
| 3330.0 4 | D | 266.8 1 | 100 | 3063.2 | ||||
| 3387.5 4 | D | 324.3 1 | 100 | 3063.2 | ||||
| 3626.6 4 | D | 296.6 1 | 100 | 3330.0 | ||||
| 3676.2 3 | D | 655.2 2 716.5 1 737.7 2 | 10.0 8 100.0 11 20.3 8 | 3021.4 2959.7 2938.3 | ||||
| 3776.0 4 | D | 388.5 1 | 100 | 3387.5 | ||||
| 3794.1 4 | D | 406.6 1 | 100 | 3387.5 | ||||
| 3851.4 4 | D | 830.0 12 893? | 100 | 3021.4 2959.7 | ||||
| 4088.3 3 | D | 236.9 1 412.1 1 | 11.9 4 100.0 8 | 3851.4 3676.2 | ||||
| 4349.4 3 | D | 261.0 1 | 100 | 4088.3 | ||||
| 4613.5 3 | D | 525.2 1 | 100 | 4088.3 | ||||
| 4645.0 4 | D | 868.9 2 | 100 | 3776.0 | ||||
| 4652.2 4 | D | 876.3 2 | 100 | 3776.0 | ||||
| 4779.1 4 | D | 1003.1 2 | 100 | 3776.0 | ||||
| 4955.9 4 | D | 606.3 1 | 100 | 4349.4 | ||||
| 4996.2 4 | D | 382.8 1 | 100 | 4613.5 | ||||
| 5064.8 5 | D | 1288.8 3 | 100 | 3776.0 | ||||
| 5142.2 4 | D | 146.0 1 | 100 | 4996.2 | ||||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 5229.2 4 | D | 576.5 3 583.7 2 | 35 8 100 19 | 4652.2 4645.0 | ||||
| 5362.1 4 | D | 366.3 2 406.1 1 1013.4 3 | 65 4 100 11 71 5 | 4996.2 4955.9 4349.4 | ||||
| 5415.3 4 | D | 185.9 1 273.1 1 350? 636.7 7 763.5 2 770.7 2 | 20.4 10 100.0 14 19 9 19.1 14 40.5 14 | 5229.2 5142.2 5064.8 4779.1 4652.2 4645.0 | ||||
| 5628.9 4 | D | 266.8 1 | 100 | 5362.1 | ||||
| 6166.0 4 | D | 1023.8 2 | 100 | 5142.2 | ||||
| 6259.3 4 | D | 844.0 2 | 100 | 5415.3 | ||||
| 6619.2 4 ? | D | 1203.9 2 ? | 100 | 5415.3 | ||||
| 6781.7 5 | D | 615.7 2 | 100 | 6166.0 | ||||
E(level): Deduced from least-squares fit to Eγ data. Reduced χ2=3.4 is lager than critical χ2=1.8 at 95% confidence level, probably due to underestimated uncertainty of 0.1 keV for many γ rays, especially for some unresolved structures. Five Eγ values deviate by 2-3 σ from the fitted values
Jπ(level): Above (9+): from measured stretched multipolarities and increasing spin values with increasing energy excitation based on the heavy-ion reaction type
E(γ): From 102Pd(58Ni,pnγ) dataset (2016Ca15) that are more precise than those from IT decay, which are systematically 0.5 to 1 keV higher in energy
I(γ): Values from 102Pd(58Ni,pnγ) dataset (2016Ca15)
M(γ): From 158Ta IT decay:6.1~μs dataset (2016Ca15, 2014Ca03) based on intensity balance arguments and transition rates for expected level lifetime, except where noted. Only pure multipolarities were assumed.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - γ cascade based on 10+. | |||||||
| 207.10 20 | (10+) | ||||||
| 953.40 22 | (12+) | ||||||
| 1551.53 24 | (14+) | 159.5 2 ? 598.1 1 | 2.0 2 100 | (E2) | 1391.88 953.40 | (12+) | |
| 1804.2 3 | (16+) | 252.9 1 | 100 | (E2) | 1551.53 | (14+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - γ cascade based on 19- isomer | |||||||
| 2805.5 4 | (19-) | 6.1 µs 1 % IT = 98.6 2 % α = 1.4 2 | |||||
| 3063.2 4 | |||||||
| 3387.5 4 | 324.3 1 | 100 | 3063.2 | ||||
| 3776.0 4 | 388.5 1 | 100 | 3387.5 | ||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 3 - γ cascade based on 3676.5 level | |||||||
| 3676.2 3 | |||||||
| 4088.3 3 | |||||||
| 4613.5 3 | 525.2 1 | 100 | 4088.3 | ||||
| 4996.2 4 | 382.8 1 | 100 | 4613.5 | ||||
| 5142.2 4 | 146.0 1 | 100 | 4996.2 | ||||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 207.10 | (10+) | 66.1 2 | (M1) | 2.46 | α=2.46, α(L)=1.90 4, α(M)=0.432 8, α(N)=0.1034 18, α(O)=0.0164 3, α(P)=0.001130 19 | |
| 919.50 | (11+) | 778.5 1 | (E2) | 0.00723 | α=0.00723, α(K)=0.00586 9, α(L)=0.001057 15, α(M)=0.000244 4, α(N)=5.80×10-5 9, α(O)=8.85E-6 13, α(P)=5.03E-7 7 | |
| 953.40 | (12+) | 33.9 | (M1) | 17.52 | α=17.52, α(L)=13.57 19, α(M)=3.08 5, α(N)=0.737 11, α(O)=0.1165 17, α(P)=0.00804 12 | |
| (12+) | 746.3 1 | (E2) | 0.00792 | α=0.00792, α(K)=0.00640 9, α(L)=0.001176 17, α(M)=0.000271 4, α(N)=6.45×10-5 9, α(O)=9.83E-6 14, α(P)=5.49E-7 8 | ||
| 1551.53 | (14+) | 598.1 1 | (E2) | 0.01306 | α=0.01306, α(K)=0.01031 15, α(L)=0.00212 3, α(M)=0.000494 7, α(N)=0.0001172 17, α(O)=1.757×10-5 25, α(P)=8.79E-7 13 | |
| 1804.2 | (16+) | 252.9 1 | (E2) | 0.1387 | α=0.1387, α(K)=0.0886 13, α(L)=0.0382 6, α(M)=0.00935 14, α(N)=0.00220 3, α(O)=0.000305 5, α(P)=6.76×10-6 10 | |
| 2387.2 | (17+) | 583.0 2 | (M1) | 0.0350 | α=0.0350, α(K)=0.0293 5, α(L)=0.00444 7, α(M)=0.001003 14, α(N)=0.000240 4, α(O)=3.81×10-5 6, α(P)=2.68E-6 4 | |
| 2805.5 | (19-) | 6.1 µs 1 % IT = 98.6 2 % α = 1.4 2 | 418.5 7 | (M2) | 0.278 | B(M2)(W.u.)=0.00054 8, α=0.278, α(K)=0.223 4, α(L)=0.0425 7, α(M)=0.00990 15, α(N)=0.00238 4, α(O)=0.000373 6, α(P)=2.46×10-5 4 |
| (19-) | 6.1 µs 1 % IT = 98.6 2 % α = 1.4 2 | 708.1 9 | (E3) | 0.0224 | B(E3)(W.u.)=0.146 13, α=0.0224, α(K)=0.01644 24, α(L)=0.00460 7, α(M)=0.001103 17, α(N)=0.000262 4, α(O)=3.85E-5 6, α(P)=1.598E-6 23 | |
| (19-) | 6.1 µs 1 % IT = 98.6 2 % α = 1.4 2 | 1001.6 11 | (E3) | 0.00949 | B(E3)(W.u.)=0.110 8, α=0.00949, α(K)=0.00745 11, α(L)=0.001568 23, α(M)=0.000367 6, α(N)=8.75E-5 13, α(O)=1.325E-5 19, α(P)=7.01E-7 10 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 141 | (9+) | 36.7 ms 15 % ε = 5 5 % α = 95 5 | Possible configuration=πh11/2~#νf7/2 based on that for 9+ isomers in neighboring nuclei (2016Ca15 cite 1997Da07). |
| 207.10 | (10+) | E(level): γ cascade based on 10+. | |
| 953.40 | (12+) | E(level): γ cascade based on 10+. | |
| 1551.53 | (14+) | E(level): γ cascade based on 10+. | |
| 1804.2 | (16+) | E(level): γ cascade based on 10+. | |
| 2805.5 | (19-) | 6.1 µs 1 % IT = 98.6 2 % α = 1.4 2 | An α peak observed at 8644 keV 11 from this isomer, assignment based on correlated γ rays with this α line. No protons were observed from this isomer, even though allowed by decay Q value. E(level): An α peak observed at 8644 keV 11 from this isomer, assignment based on correlated γ rays with this α line. No protons were observed from this isomer, even though allowed by decay Q value. γ cascade based on 19- isomer. |
| 3063.2 | E(level): γ cascade based on 19- isomer. | ||
| 3387.5 | E(level): γ cascade based on 19- isomer. | ||
| 3676.2 | E(level): γ cascade based on 3676.5 level. | ||
| 3776.0 | E(level): γ cascade based on 19- isomer. | ||
| 4088.3 | E(level): γ cascade based on 3676.5 level. | ||
| 4613.5 | E(level): γ cascade based on 3676.5 level. | ||
| 4996.2 | E(level): γ cascade based on 3676.5 level. | ||
| 5142.2 | E(level): γ cascade based on 3676.5 level. |
| E(level) | E(gamma) | Comments |
| 207.10 | 66.1 | E(γ): From 2016Ca15 (Table II) for delayed γ rays from the 6.1-μs isomer M(γ): From intensity balance arguments (158Ta IT decay, 2014Ca03) |
| 919.50 | 778.5 | M(γ): From consistency with angular correlation data in 2016Ca15, although, no data are provided, reason for which the assignments are still to be confirmed by futher study. |
| 923.2 | 782.2 | E(γ): From 2016Ca15 (Table II) for delayed γ rays from the 6.1-μs isomer |
| 953.40 | 33.9 | E(γ): γ not observed, its existence required by γγ-coin data. Energy was deduced from difference of connecting levels | 746.3 | M(γ): From consistency with angular correlation data in 2016Ca15, although, no data are provided, reason for which the assignments are still to be confirmed by futher study. |
| 1391.88 | 33.4 | E(γ): possible transition discussed in text (2016Ca15), not shown in authors’ level scheme (Fig. 3). γ not observed, its existence required by γγ-coin data. Energy was deduced from difference of connecting levels |
| 1551.53 | 598.1 | M(γ): From consistency with angular correlation data in 2016Ca15, although, no data are provided, reason for which the assignments are still to be confirmed by futher study. |
| 1804.2 | 252.9 | E(γ): level-energy difference=252.7 M(γ): From consistency with angular correlation data in 2016Ca15, although, no data are provided, reason for which the assignments are still to be confirmed by futher study. |
| 1824.92 | 273.1 | E(γ): unresolved triplet, placed from 1825, 2099 and 5415 levels. level-energy difference=273.4. Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 2098.2 | 72.7 | E(γ): γ not observed, its existence required by γγ-coin data. Energy was deduced from difference of connecting levels | 273.1 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 2387.2 | 583.0 | E(γ): 583.0+583.7 and 406.1+406.6 form unresolved doublets; however, based on γγ-coin data, separated intensities are assigned |
| 2805.5 | 418.5 | E(γ): From the IT decay dataset I(γ): From the IT decay dataset | 708.1 | E(γ): From the IT decay dataset I(γ): From the IT decay dataset | 1001.6 | E(γ): From the IT decay dataset I(γ): From the IT decay dataset |
| 2959.7 | 357.9 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 3330.0 | 266.8 | E(γ): unresolved doublet, placed from 3330 and 5629 levels. Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |
| 3794.1 | 406.6 | E(γ): 583.0+583.7 and 406.1+406.6 form unresolved doublets; however, based on γγ-coin data, separated intensities are assigned |
| 5229.2 | 583.7 | E(γ): level-energy difference=584.2. 583.0+583.7 and 406.1+406.6 form unresolved doublets; however, based on γγ-coin data, separated intensities are assigned |
| 5362.1 | 406.1 | E(γ): 583.0+583.7 and 406.1+406.6 form unresolved doublets; however, based on γγ-coin data, separated intensities are assigned | 1013.4 | E(γ): level-energy difference=1012.7 |
| 5415.3 | 273.1 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity | 770.7 | E(γ): level-energy difference=770.3 |
| 5628.9 | 266.8 | E(γ): Multiply placed with undivided intensity I(γ): Multiply placed with undivided intensity |