ADOPTED LEVELS, GAMMAS for 102Nb
Author: D. De Frenne | Citation: Nucl. Data Sheets 110, 1745 (2009) | Cutoff date: 31-Dec-2008
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=7260 keV 9 | S(n)= 5494 keV 5 | S(p)= 10429 keV 9 | Q(α)= -6435 keV 9 | ||
Reference: 2012WA38 |
References: | |||
A | 102Zr β- decay:2.9 S | B | 252Cf SF decay |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | AB | (4+) | 4.3 s 4 % β- = 100 | |||||
0.0+X | A | 1+ | 1.3 s 2 % β- = 100 | |||||
20.37+X 9 | A | 20.38 9 | 100 | (E1) | 0.0+X | 1+ | ||
64.39+X 9 | A | (2+) | 64.46 13 | 100 | M1 | 0.0+X | 1+ | |
93.95+X 17 | A | 73.58 14 | 100 | 20.37+X | ||||
156.36+X 11 | A | 136.35 22 156.14 14 | 41 18 100 24 | 20.37+X 0.0+X | 1+ | |||
160.72+X 21 | A | 96.4 5 | 100 | 64.39+X | (2+) | |||
246.31+X 18 | A | 85.59 12 152.4 60 225.35 32 246.55 26 | 70 30 100 40 87 30 56 8 | 160.72+X 93.95+X 20.37+X 0.0+X | 1+ | |||
258.43+X 15 | A | 102.02 17 258.52 22 | 100 11 50 7 | 156.36+X 0.0+X | 1+ | |||
430.7+X 6 | A | 270.0 5 | 100 | 160.72+X | ||||
599.49+X 8 | A | 1+ | 442.3 5 535.13 9 599.48 9 | 3.5 15 77 7 100 9 | 156.36+X 64.39+X 0.0+X | (2+) 1+ | ||
705.08+X 24 | A | (1) | 458.69 21 549.0 5 641.2 8 | 69 25 100 31 34 13 | 246.31+X 156.36+X 64.39+X | (2+) | ||
940.5+X 4 | A | (1) | 875.8 8 940.6 4 | 55 18 100 18 | 64.39+X 0.0+X | (2+) 1+ | ||
0+Y | B | (1+) | Y | | | | ||
64.5+Y | B | (2+) | 64.5 | 100 | 0+Y | (1+) | ||
161.9+Y | B | (3+) | 97.4 | 100 | 64.5+Y | (2+) | ||
287.4+Y | B | (4+) | 125.5 222.9 | 100 17 | 161.9+Y 64.5+Y | (3+) (2+) | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
453.1+Y | B | (5+) | 165.7 291.2 | 100 1.6 | 287.4+Y 161.9+Y | (4+) (3+) | ||
632.5+Y | B | (6+) | 179.4 345.1 | 100 6 | 453.1+Y 287.4+Y | (5+) (4+) | ||
871.1+Y | B | (7+) | 238.6 418.0 | 100 19 | 632.5+Y 453.1+Y | (6+) (5+) | ||
1099.6+Y | B | (8+) | 228.5 467.1 | 100 26 | 871.1+Y 632.5+Y | (7+) (6+) | ||
1406.9+Y | B | (9+) | 307.3 535.8 | 100 28 | 1099.6+Y 871.1+Y | (8+) (7+) | ||
1677.5+Y | B | (10+) | 270.6 577.9 | 100 31 | 1406.9+Y 1099.6+Y | (9+) (8+) | ||
0.0+Z | B | (3-) | Z | | 0.0 | (4+) | ||
162.8+Z | B | (4-) | 162.8 | 100 | 0.0+Z | (3-) | ||
356.2+Z | B | (5-) | 193.4 356.2 | 100 27 | 162.8+Z 0.0+Z | (4-) (3-) | ||
440.8+Z | B | (2-) | 278.0 440.8 | 75 100 | 162.8+Z 0.0+Z | (4-) (3-) | ||
545.0+Z | B | (3-) | 104.2 188.8 382.2 | 100 36 50 | 440.8+Z 356.2+Z 162.8+Z | (2-) (5-) (4-) | ||
580.6+Z | B | (6-) | 224.4 417.8 | 100 50 | 356.2+Z 162.8+Z | (5-) (4-) | ||
677.2+Z | B | (4-) | 96.6? 132.2 236.4 | 100 9 | 580.6+Z 545.0+Z 440.8+Z | (6-) (3-) (2-) | ||
833.0+Z | B | (7-) | 252.4 476.8 | 100 42 | 580.6+Z 356.2+Z | (6-) (5-) | ||
852.0+Z | B | (5-) | 174.8 307.0 | 100 13 | 677.2+Z 545.0+Z | (4-) (3-) | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1045.1+Z | B | (6-) | 193.1 212.1? 367.9 | 100 58 | 852.0+Z 833.0+Z 677.2+Z | (5-) (7-) (4-) | ||
1116.9+Z | B | (8-) | 283.9 536.3 | 100 72 | 833.0+Z 580.6+Z | (7-) (6-) | ||
1284.2+Z | B | (7-) | 239.1 432.2 | 100 30 | 1045.1+Z 852.0+Z | (6-) (5-) | ||
1421.7+Z | B | (9-) | 304.8 588.7 | 86 100 | 1116.9+Z 833.0+Z | (8-) (7-) | ||
1584.0+Z | B | (8-) | 301.8 540.9 | 100 50 | 1284.2+Z 1045.1+Z | (7-) (6-) | ||
1758.2+Z | B | (10-) | 336.5? 641.3 | 100 | 1421.7+Z 1116.9+Z | (9-) (8-) | ||
1854.2+Z | B | (9-) | 268.2 570.0 | 100 46 | 1584.0+Z 1284.2+Z | (8-) (7-) | ||
2286.4+Z | B | (10-) | 432.2 700.4 | 100 47 | 1854.2+Z 1584.0+Z | (9-) (8-) |
E(level): Calculated by the evaluator using a least-squares procedure based on adopted gammas.
Jπ(level): The consequence of the fact that the high spin level would be the ground state and not the low spin is that the spin assignments proposed by 2001Hw01,1998Hw08 in (HI,xnγ) become very uncertain as they still consider the low spin isomer as the ground state.All other proposed spins for excited states are based on that assumption. Maybe what they consider as a 120 keV level could be the ground state.
T1/2(level): From β-delayed gammas in 102Nb β- decay (1976Ah06)
M(γ): Based on measured conversion coefficients
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - Δ^J=1 Band based on (6+) | |||||||
632.5+Y | (6+) | ||||||
871.1+Y | (7+) | ||||||
1099.6+Y | (8+) | 228.5 467.1 | 100 26 | 871.1+Y 632.5+Y | (7+) (6+) | ||
1406.9+Y | (9+) | 307.3 535.8 | 100 28 | 1099.6+Y 871.1+Y | (8+) (7+) | ||
1677.5+Y | (10+) | 270.6 577.9 | 100 31 | 1406.9+Y 1099.6+Y | (9+) (8+) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - Kπ=3-, α=1. | |||||||
0.0+Z | (3-) | ||||||
356.2+Z | (5-) | ||||||
833.0+Z | (7-) | 252.4 476.8 | 100 42 | 580.6+Z 356.2+Z | (6-) (5-) | ||
1421.7+Z | (9-) | 304.8 588.7 | 86 100 | 1116.9+Z 833.0+Z | (8-) (7-) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - Kπ=3-, α=0. | |||||||
162.8+Z | (4-) | ||||||
580.6+Z | (6-) | ||||||
1116.9+Z | (8-) | 283.9 536.3 | 100 72 | 833.0+Z 580.6+Z | (7-) (6-) | ||
1758.2+Z | (10-) | 336.5? 641.3 | 100 | 1421.7+Z 1116.9+Z | (9-) (8-) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 4 - Kπ=2-, α=0. | |||||||
440.8+Z | (2-) | ||||||
677.2+Z | (4-) | ||||||
1045.1+Z | (6-) | 193.1 212.1? 367.9 | 100 58 | 852.0+Z 833.0+Z 677.2+Z | (5-) (7-) (4-) | ||
1584.0+Z | (8-) | 301.8 540.9 | 100 50 | 1284.2+Z 1045.1+Z | (7-) (6-) | ||
2286.4+Z | (10-) | 432.2 700.4 | 100 47 | 1854.2+Z 1584.0+Z | (9-) (8-) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 5 - Kπ=2-, α=1. | |||||||
545.0+Z | (3-) | ||||||
852.0+Z | (5-) | ||||||
1284.2+Z | (7-) | 239.1 432.2 | 100 30 | 1045.1+Z 852.0+Z | (6-) (5-) | ||
1854.2+Z | (9-) | 268.2 570.0 | 100 46 | 1584.0+Z 1284.2+Z | (8-) (7-) |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | (4+) | 4.3 s 4 % β- = 100 | %β-=100. |
0.0+X | 1+ | 1.3 s 2 % β- = 100 | %β-=100; no it decay reported. |
632.5+Y | (6+) | E(level): Δ^J=1 Band based on (6+). | |
871.1+Y | (7+) | E(level): Δ^J=1 Band based on (6+). | |
1099.6+Y | (8+) | E(level): Δ^J=1 Band based on (6+). | |
1406.9+Y | (9+) | E(level): Δ^J=1 Band based on (6+). | |
1677.5+Y | (10+) | E(level): Δ^J=1 Band based on (6+). | |
0.0+Z | (3-) | Eγ=z could be γ to (4+) g.s. and not to a level at 120 keV as suggested by 2001Hw01. E(level): Eγ=z could be γ to (4+) g.s. and not to a level at 120 keV as suggested by 2001Hw01. Kπ=3-, α=1. | |
162.8+Z | (4-) | E(level): Kπ=3-, α=0. | |
356.2+Z | (5-) | E(level): Kπ=3-, α=1. | |
440.8+Z | (2-) | E(level): Kπ=2-, α=0. | |
545.0+Z | (3-) | E(level): Kπ=2-, α=1. | |
580.6+Z | (6-) | E(level): Kπ=3-, α=0. | |
677.2+Z | (4-) | E(level): Kπ=2-, α=0. | |
833.0+Z | (7-) | E(level): Kπ=3-, α=1. | |
852.0+Z | (5-) | E(level): Kπ=2-, α=1. | |
1045.1+Z | (6-) | E(level): Kπ=2-, α=0. | |
1116.9+Z | (8-) | E(level): Kπ=3-, α=0. | |
1284.2+Z | (7-) | E(level): Kπ=2-, α=1. | |
1421.7+Z | (9-) | E(level): Kπ=3-, α=1. | |
1584.0+Z | (8-) | E(level): Kπ=2-, α=0. | |
1758.2+Z | (10-) | E(level): Kπ=3-, α=0. | |
1854.2+Z | (9-) | E(level): Kπ=2-, α=1. | |
2286.4+Z | (10-) | E(level): Kπ=2-, α=0. |
Levels: The level scheme of 102Nb is extremely complicated and it is not even clear what the Jπ of the ground state and the long lived isomer is. Therefore the experimental results are given in 3 subsets of data as no unique level scheme could be obtained. Further experiments are absolutely necessary to solve that problem
Levels: All band assignments are from 2001Hw01,1998Hw08 in 252Cf SF decay. Due to the controversy about the position of the ground state an the isomer, band (β) on the Jπ=1+ state mentioned in 252Cf SF decay has been omitted.
Gammas: Two sets of γ’s 64.5 and 64.46 keV and 97.4 and 96.4 keV appear in both data sets and are very probably the same. However their exact position in the level scheme is not clear for the moment and more experiments are needed because the level scheme of 102Nb remains very speculative
Q-value: Note: Current evaluation has used the following Q record 7.21×103 4 5.48×103 4 1.018×104 5 -6.30×103 5 2003Au03
Q-value: Following (2007Ri01), from mass measurements, the energy difference between 102Nb gs and 102Nb isomer is 93 keV 23 with the high spin isomer being the ground state