ADOPTED LEVELS, GAMMAS for 156Tm
Author: C. W. Reich | Citation: Nucl. Data Sheets 113, 2537 (2012) | Cutoff date: 1-Mar-2012
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-3569 keV 13 | S(n)= 8280 keV 17 | S(p)= 1914 keV 16 | Q(α)= 4345 keV 7 | ||
| S(2n)= 18550 keV 17 | S(2p)= 6773 keV 16 | Q(EC)= 7.38×103 keV 3 | Q(ECp)= 1916 keV 23 | ||
| Reference: 2017WA10 | |||||
| References: | |||
| A | 147Sm(14N,5nγ),144Sm(19F,2P5N) | B | 156Yb ε decay |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0 | B | 2- | 83.8 s 18 % ε = 99.936 10 % α = 0.064 10 | |||||
| 115.2 2 | B | 1+ | 115.2 2 | 100 | E1 | 0 | 2- | |
| 317.5 | B | 1+ | 202.3 | 100 | M1 | 115.2 | 1+ | |
| 0+X | A | |||||||
| 203.6+X | A | (11-) | ≈ 400 ns | 203.6 | 100 | 0+X | ||
| 771.2+X | A | (13-) | 567.6 | 100 | 203.6+X | (11-) | ||
| 1366.0+X | A | (15-) | 594.8 | 100 | 771.2+X | (13-) | ||
| 1725.7+X | A | (16-) | 359.7 | 100 | 1366.0+X | (15-) | ||
| 2056.6+X | A | (17-) | 330.9 | 100 | 1725.7+X | (16-) | ||
| 2335.6+X | A | (18-) | 609.9 | 100 | 1725.7+X | (16-) | ||
| 2535.0+X | A | (19-) | 199.4 479 | | 2335.6+X 2056.6+X | (18-) (17-) | ||
| 3234+X | A | (21-) | 699 | 100 | 2535.0+X | (19-) | ||
| 3407+X | A | (22-) | 173 | 100 | 3234+X | (21-) | ||
| 3978+X | A | (23-) | 744 | 100 | 3234+X | (21-) | ||
| 4773+X | A | (25-) | 795 | 100 | 3978+X | (23-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion | |||||||
| 203.6+X | (11-) | ≈ 400 ns | |||||
| 771.2+X | (13-) | 567.6 | 100 | 203.6+X | (11-) | ||
| 1366.0+X | (15-) | 594.8 | 100 | 771.2+X | (13-) | ||
| 1725.7+X | (16-) | ||||||
| 2056.6+X | (17-) | 330.9 | 100 | 1725.7+X | (16-) | ||
| 2335.6+X | (18-) | 609.9 | 100 | 1725.7+X | (16-) | ||
| 2535.0+X | (19-) | 199.4 479 | | 2335.6+X 2056.6+X | (18-) (17-) | ||
| 3234+X | (21-) | 699 | 100 | 2535.0+X | (19-) | ||
| 3407+X | (22-) | 173 | 100 | 3234+X | (21-) | ||
| 3978+X | (23-) | 744 | 100 | 3234+X | (21-) | ||
| 4773+X | (25-) | 795 | 100 | 3978+X | (23-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 115.2 | 1+ | 115.2 2 | E1 | 0.231 | α=0.231 | |
| 317.5 | 1+ | 202.3 | M1 | 0.434 | α=0.434 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | 2- | 83.8 s 18 % ε = 99.936 10 % α = 0.064 10 | From an evaluation of data on nuclear rms charge radii, 2004An14 report <r2>1/2=5.102~fm~13. E(level): From an evaluation of data on nuclear rms charge radii, 2004An14 report <r2>1/2=5.102~fm~13. |
| 203.6+X | (11-) | ≈ 400 ns | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. |
| 771.2+X | (13-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 1366.0+X | (15-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 1725.7+X | (16-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 2056.6+X | (17-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 2335.6+X | (18-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 2535.0+X | (19-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 3234+X | (21-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 3407+X | (22-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 3978+X | (23-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. | |
| 4773+X | (25-) | E(level): Possible (π 7/2[523])(ν 1/2[660]) band. See the discussion. Jπ(level): Proposed by 1995Su12. See the comment in the 147Sm(14N,5nγ),144Sm(19F,2p5n) data set. |
| E(level) | E(gamma) | Comments |
| 115.2 | 115.2 | M(γ): From the measured and calculated K x-ray intensities and lack of L x rays in the 156Yb ε decay (1982To14). |
| 317.5 | 202.3 | M(γ): From 1999KaZV. No basis given. |
An activity with T1/2=19~s~3, associated with a 4.46-MeV α and having a high spin, was reported by 1971To10. Subsequent studies have not confirmed this activity; and it is not included in this evaluation.