ADOPTED LEVELS, GAMMAS for 81Zr
Author: Coral M. Baglin | Citation: Nucl. Data Sheets 109, 2257 (2008) | Cutoff date: 15-Aug-2008
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-1.14×104 keV SY | S(n)= 1.10×104 keV 15 | S(p)= 4.54×103 keV 17 | Q(α)= -3.02×103 keV 17 | ||
Reference: 2012WA38 |
References: | |||
A | 58Ni(28Si,αnγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0.0 | A | (3/2-) | 5.5 s 4 % ε = 100 % εp = 0.12 2 | |||||
0.0+X | A | (5/2+) | ||||||
133.2 3 | A | (1/2+) | < 28 ns | 133.4 4 | 100 | [E1] | 0.0 | (3/2-) |
142.978+X 16 | A | (7/2+) | 143.0 2 | 100 | (M1) | 0.0+X | (5/2+) | |
167.21 17 | A | (5/2-) | 167.2 2 | 100 | [M1+E2] | 0.0 | (3/2-) | |
191.85 19 | A | (3/2+) | < 28 ns | 58.7? 191.8 2 | 100 | [E1] | 133.2 0.0 | (1/2+) (3/2-) |
303.0+X 16 | A | (9/2+) | 160.1 2 303.0 2 | 100 6 33.0 21 | (M1) | 142.978+X 0.0+X | (7/2+) (5/2+) | |
369.94 23 | A | (5/2+) | 178.0 2 236.8 2 | 89 22 100 22 | [M1+E2] | 191.85 133.2 | (3/2+) (1/2+) | |
405.39 17 | A | (7/2-) | 238.2 3 405.4 2 | 100 4 36 4 | (M1) | 167.21 0.0 | (5/2-) (3/2-) | |
501.22 25 | A | (7/2+) | 309.4 2 | 100 | 191.85 | (3/2+) | ||
697.62 19 | A | (9/2-) | 292.3 2 530.4 2 | 83 4 100 4 | (M1) (E2) | 405.39 167.21 | (7/2-) (5/2-) | |
737.08+X 19 | A | (11/2+) | 434.1 2 594.1 2 | 100 8 27.9 21 | (M1+E2) | 303.0+X 142.978+X | (9/2+) (7/2+) | |
832.2 3 | A | (9/2+) | 331.0 2 462.2 2 | 23 4 100 15 | 501.22 369.94 | (7/2+) (5/2+) | ||
979.48+X 21 | A | (13/2+) | 242.4 2 676.4 2 | 11.4 8 100.0 20 | (E2) | 737.08+X 303.0+X | (11/2+) (9/2+) | |
1026.9 4 | A | (11/2+) | 525.7 2 | 100 | 501.22 | (7/2+) | ||
1065.06 21 | A | (11/2-) | 367.5 2 659.6 2 | 66 3 100 6 | (M1) (E2) | 697.62 405.39 | (9/2-) (7/2-) | |
1466.63 23 | A | (13/2-) | 401.6 2 769.0 2 | 22.9 13 100 8 | (M1+E2) | 1065.06 697.62 | (11/2-) (9/2-) | |
1528.2 4 | A | (13/2+) | 696.0 2 | 100 | 832.2 | (9/2+) | ||
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
1576.24+X 23 | A | (15/2+) | 596.8 2 839.2 2 | 46 4 100 10 | 979.48+X 737.08+X | (13/2+) (11/2+) | ||
1769.4 4 | A | (15/2+) | 742.5 2 | 100 | 1026.9 | (11/2+) | ||
1865.58+X 25 | A | (17/2+) | 289.4 2 886.0 2 | 18.7 13 100.0 26 | (E2) | 1576.24+X 979.48+X | (15/2+) (13/2+) | |
1960.2 3 | A | (15/2-) | 493.6 2 895.1 2 | 33 4 100 13 | 1466.63 1065.06 | (13/2-) (11/2-) | ||
2438.2 4 | A | (17/2+) | 910.0 2 | 100 | 1528.2 | (13/2+) | ||
2455.6 16 | A | (17/2-) | 987.8 2 | 100 | 1466.63 | (13/2-) | ||
2615.2+X 3 | A | (19/2+) | 749.6 2 1039.0 2 | 60 16 100 9 | 1865.58+X 1576.24+X | (17/2+) (15/2+) | ||
2728.2 5 | A | (19/2+) | 958.8 2 | 100 | 1769.4 | (15/2+) | ||
2930.4+X 4 | A | (21/2+) | 1064.8 2 | 100 | 1865.58+X | (17/2+) | ||
3069.4 4 | A | (19/2-) | 1109.2 2 | 100 | 1960.2 | (15/2-) | ||
3553.2 11 | A | (21/2+) | 1115 1 | 100 | 2438.2 | (17/2+) | ||
3635.4 4 | A | (21/2-) | 1181.0 2 | 100 | 2455.6 | (17/2-) | ||
3797.2+X 11 | A | (23/2+) | 1182 | 100 | 2615.2+X | (19/2+) | ||
3899.9 6 | A | (23/2+) | 1171.7 4 | 100 | 2728.2 | (19/2+) | ||
4055.1+X 4 | A | (25/2+) | 1124.7 2 | 100 | 2930.4+X | (21/2+) | ||
4334.2 5 | A | (23/2-) | 1264.8 3 | 100 | 3069.4 | (19/2-) | ||
4889.3 6 | A | (25/2-) | 1253.8 4 | 100 | 3635.4 | (21/2-) | ||
5128.6+X 5 | A | (29/2+) | 1073.5 2 | 100 | 4055.1+X | (25/2+) | ||
5271.9 12 | A | (27/2+) | 1372 | 100 | 3899.9 | (23/2+) | ||
5672.2 11 | A | (27/2-) | 1338 | 100 | 4334.2 | (23/2-) | ||
6244.3 12 | A | (29/2-) | 1355 | 100 | 4889.3 | (25/2-) | ||
6317.6+X 11 | A | (33/2+) | 1189 | 100 | 5128.6+X | (29/2+) | ||
6835.9 16 ? | A | (31/2+) | 1564? | 100 | 5271.9 | (27/2+) | ||
7708.6+X 15 | A | (37/2+) | 1391 | 100 | 6317.6+X | (33/2+) |
E(level): From-least squares fit to Eγ.
Jπ(level): Based on energy systematics in neighboring n=41 isotones or Tz=1/2 nuclides, and supported by measured ADO and DCO ratios and γ(θ) in 58Ni(28Si,αnγ), except as noted.
M(γ): From γ(θ) in 58Ni(28Si,αnγ), assigning Δπ=(no) to intraband transitions, except as noted.
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 1 - ν 3/2[301], α=+1/2 band (2000Ma04). | |||||||
167.21 17 | (5/2-) | ||||||
697.62 19 | (9/2-) | ||||||
1466.63 23 | (13/2-) | 401.6 2 769.0 2 | 22.9 13 100 8 | (M1+E2) | 1065.06 697.62 | (11/2-) (9/2-) | |
2455.6 16 | (17/2-) | 987.8 2 | 100 | 1466.63 | (13/2-) | ||
3635.4 4 | (21/2-) | 1181.0 2 | 100 | 2455.6 | (17/2-) | ||
4889.3 6 | (25/2-) | 1253.8 4 | 100 | 3635.4 | (21/2-) | ||
6244.3 12 | (29/2-) | 1355 | 100 | 4889.3 | (25/2-) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 2 - ν 5/2[422], α=+1/2 band (2000Ma04). | |||||||
0.0+X | (5/2+) | ||||||
303.0+X 16 | (9/2+) | ||||||
979.48+X 21 | (13/2+) | 242.4 2 676.4 2 | 11.4 8 100.0 20 | (E2) | 737.08+X 303.0+X | (11/2+) (9/2+) | |
1865.58+X 25 | (17/2+) | 289.4 2 886.0 2 | 18.7 13 100.0 26 | (E2) | 1576.24+X 979.48+X | (15/2+) (13/2+) | |
2930.4+X 4 | (21/2+) | 1064.8 2 | 100 | 1865.58+X | (17/2+) | ||
4055.1+X 4 | (25/2+) | 1124.7 2 | 100 | 2930.4+X | (21/2+) | ||
5128.6+X 5 | (29/2+) | 1073.5 2 | 100 | 4055.1+X | (25/2+) | ||
6317.6+X 11 | (33/2+) | 1189 | 100 | 5128.6+X | (29/2+) | ||
7708.6+X 15 | (37/2+) | 1391 | 100 | 6317.6+X | (33/2+) | ||
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
Band 3 - ν 1/2[431], α=+1/2 band. | |||||||
133.2 3 | (1/2+) | < 28 ns | |||||
369.94 23 | (5/2+) | ||||||
832.2 3 | (9/2+) | 331.0 2 462.2 2 | 23 4 100 15 | 501.22 369.94 | (7/2+) (5/2+) | ||
1528.2 4 | (13/2+) | 696.0 2 | 100 | 832.2 | (9/2+) | ||
2438.2 4 | (17/2+) | 910.0 2 | 100 | 1528.2 | (13/2+) | ||
3553.2 11 | (21/2+) | 1115 1 | 100 | 2438.2 | (17/2+) |
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
133.2 | (1/2+) | < 28 ns | 133.4 4 | [E1] | 0.0489 | B(E1)(W.u.)>5.1E-6, α=0.0489 8 |
142.978+X | (7/2+) | 143.0 2 | (M1) | 0.0761 | α=0.0761 | |
167.21 | (5/2-) | 167.2 2 | [M1+E2] | 0.11 | α=0.11 6 | |
191.85 | (3/2+) | < 28 ns | 191.8 2 | [E1] | 0.01705 | B(E1)(W.u.)>1.8E-6, α=0.01705 |
303.0+X | (9/2+) | 160.1 2 | (M1) | 0.0562 | α=0.0562 | |
369.94 | (5/2+) | 178.0 2 | [M1+E2] | 0.09 | α=0.09 5 | |
405.39 | (7/2-) | 238.2 3 | (M1) | 0.0198 | α=0.0198 | |
697.62 | (9/2-) | 292.3 2 | (M1) | 0.01180 | α=0.01180 | |
(9/2-) | 530.4 2 | (E2) | 0.00352 | α=0.00352 | ||
737.08+X | (11/2+) | 434.1 2 | (M1+E2) | 0.0055 | α=0.0055 10 | |
979.48+X | (13/2+) | 676.4 2 | (E2) | 1.78×10-3 | α=1.78×10-3 | |
1065.06 | (11/2-) | 367.5 2 | (M1) | 6.69×10-3 | α=6.69×10-3 | |
(11/2-) | 659.6 2 | (E2) | 0.00190 | α=0.00190 | ||
1466.63 | (13/2-) | 401.6 2 | (M1+E2) | 0.0068 | α=0.0068 15 | |
1865.58+X | (17/2+) | 886.0 2 | (E2) | 8.93×10-4 | α=8.93×10-4 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | (3/2-) | 5.5 s 4 % ε = 100 % εp = 0.12 2 | Jπ(level): From 1999Hu05 and 2005Xu04; leads to consistency between measured p spectrum and statistical model calculations using level densities from backshifted Fermi gas model (1999Hu05), but statistics are too poor to differentiate between several alternative Jπ possibilities. See also 2005Xu04. Jπ=3/2(-) for 79Sr isotone. T1/2(level): Weighted average of 5.3 s 5 (386γ(t)(80Sr), 1997Hu15; see also 1999Hu05) and 5.9 s 6 (1977FaZW). Others: 15 s 5 from β+(t) for component of α=81 mass spectrum (1982De36); 1997Hu15 suggest that this datum may have been corrupted due to the direct production of 70 s 81Y in the reaction used by 1982De36. T1/2=7-15 min from 1965Za02 suggests an erroneous isotopic assignment. |
0.0+X | (5/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). | |
133.2 | (1/2+) | < 28 ns | E(level): ν 1/2[431], α=+1/2 band. |
167.21 | (5/2-) | E(level): ν 3/2[301], α=+1/2 band (2000Ma04). | |
303.0+X | (9/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). | |
369.94 | (5/2+) | E(level): ν 1/2[431], α=+1/2 band. | |
697.62 | (9/2-) | E(level): ν 3/2[301], α=+1/2 band (2000Ma04). | |
832.2 | (9/2+) | E(level): ν 1/2[431], α=+1/2 band. | |
979.48+X | (13/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). | |
1466.63 | (13/2-) | E(level): ν 3/2[301], α=+1/2 band (2000Ma04). | |
1528.2 | (13/2+) | E(level): ν 1/2[431], α=+1/2 band. | |
1865.58+X | (17/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). | |
2438.2 | (17/2+) | E(level): ν 1/2[431], α=+1/2 band. | |
2455.6 | (17/2-) | E(level): ν 3/2[301], α=+1/2 band (2000Ma04). | |
2930.4+X | (21/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). | |
3553.2 | (21/2+) | E(level): ν 1/2[431], α=+1/2 band. | |
3635.4 | (21/2-) | E(level): ν 3/2[301], α=+1/2 band (2000Ma04). | |
4055.1+X | (25/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). | |
4889.3 | (25/2-) | E(level): ν 3/2[301], α=+1/2 band (2000Ma04). | |
5128.6+X | (29/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). | |
6244.3 | (29/2-) | E(level): ν 3/2[301], α=+1/2 band (2000Ma04). | |
6317.6+X | (33/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). | |
7708.6+X | (37/2+) | E(level): ν 5/2[422], α=+1/2 band (2000Ma04). |
E(level) | E(gamma) | Comments |
142.978+X | 143.0 | M(γ): d intraband transition. |
191.85 | 58.7 | E(γ): Transition expected from coincidence data, but not observed in 58Ni(28Si,αnγ) by 2004Ma39. Eγ from level energy difference. |
Production:
52Cr(32S,3n), E=110 MeV; surface barrier p detector, x-ray detector, NaI and Ge(Li) (1977FaZW, 1980HaZG).
54Fe(32S,αn), E=123 MeV; β recoil time-of-flight mass spectrometer, plastic scin (1982De36).
Ni+106Cd, E(106Cd)=60 MeV/α (1994He28).
58Ni+32S, E(32S)=150 MeV; HPGe and FWHM=60 keV Si(Au) detectors (1997Hu15, 1999Hu05).
Other: 1965Za02.
From shape of ε-delayed p spectrum, 1999Hu05 deduce Q(ε)-S(p)(81Y)=4.7 MeV 2 (cf. 4.5 MeV 2 (2003Au03)). See 1984Ha58 and 1997Hu15 for p spectrum from 81Zr εp decay. The measured β+ endpoint energy is 6.14 MeV 25 (1982De36); the 81Y level populated has not been established.
Levels: band(a) ν 3/2[301], α=-1/2 band (2000Ma04). See comment on signature partner band.
Levels: band(b) ν 5/2[422], α=-1/2 band (2000Ma04). See comment on signature partner band.
Levels: band(c) ν 1/2[431], α=-1/2 band. See comment on signature partner band.
Q-value: Note: Current evaluation has used the following Q record -11.0×103 syst 11.0×103 15 4.56×103 24-3.11×103 17 2003Au03
Q-value: ΔQ(β)=1510 (2003Au03).
Q-value: Q(ε-p)=4.53×103 17 (2003Au03).