ADOPTED LEVELS, GAMMAS for 171Ir
Authors: Coral M. Baglin, E.A. Mccutchan | Citation: Nucl. Data Sheets 151, 334 (2018) | Cutoff date: 30-Jun-2018
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-8940 keV 80 | S(n)= 11120 keV SY | S(p)= -230 keV 40 | Q(α)= 5994 keV SY | ||
| Reference: 2017Wa10 |
| References: | |||
| A | 175Au α decay (137 MS) | B | 175Au α decay (201 MS) |
| C | 116Sn(58Ni,p2nγ) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | B | (1/2+) | 3.2 s +13-7 % ε = 85 2 % α = 15 2 | |||||
| 0.0+X | A C | (11/2-) | 1.2 s 1 % α = 54 5 % ε ≤ 46 5 % p ≤ 46 5 | |||||
| 436.04+X 4 | C | (13/2-) | 435.97 4 | 100 | 0.0+X | (11/2-) | ||
| 633.90+X 4 | C | (15/2-) | 197.65 5 634.00 5 | 15.6 10 100 8 | Q | 436.04+X 0.0+X | (13/2-) (11/2-) | |
| 997.82+X 16 | C | 561.78 15 | 100 | 436.04+X | (13/2-) | |||
| 1115.95+X 5 | C | (17/2-) | 481.94 4 680.09 7 | 100 5 55 3 | 633.90+X 436.04+X | (15/2-) (13/2-) | ||
| 1353.07+X 7 | C | (19/2-) | 236.96 11 719.32 7 | 10.9 9 100 5 | Q | 1115.95+X 633.90+X | (17/2-) (15/2-) | |
| 1365.77+X 8 | C | (17/2-) | 929.83 12 | 100 | 436.04+X | (13/2-) | ||
| 1520.70+X 23 | C | 522.88 17 | 100 | 997.82+X | ||||
| 1609.30+X 6 | C | (19/2-) | 243.55 6 256.31 10 493.32 4 | 19.5 9 11.9 9 100 4 | 1365.77+X 1353.07+X 1115.95+X | (17/2-) (19/2-) (17/2-) | ||
| 1823.44+X 11 | C | (21/2-) | 470.49 14 707.24 18 | 76 7 100 9 | 1353.07+X 1115.95+X | (19/2-) (17/2-) | ||
| 1884.61+X 7 | C | (21/2-) | 275.31 4 531 3 | 100 3 1.0 13 | 1609.30+X 1353.07+X | (19/2-) (19/2-) | ||
| 2008.47+X 12 | C | (21/2) | 655.39 10 | 100 | 1353.07+X | (19/2-) | ||
| 2106.40+X 13 | C | (23/2-) | 282.83 16 753.35 14 | 30 3 100 7 | 1823.44+X 1353.07+X | (21/2-) (19/2-) | ||
| 2326.71+X 15 | C | (23/2-) | 442.10 13 | 100 | 1884.61+X | (21/2-) | ||
| 2334.14+X 15 | C | (23/2) | 325.67 9 | 100 | 2008.47+X | (21/2) | ||
| 2335.5+X 10 | C | 982.4 10 | 100 | 1353.07+X | (19/2-) | |||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 2381.49+X 10 | C | (25/2-) | 496.88 6 | 100 | 1884.61+X | (21/2-) | ||
| 2444.88+X 16 | C | (25/2-) | 338.42 12 621.63 22 | 70 6 100 11 | 2106.40+X 1823.44+X | (23/2-) (21/2-) | ||
| 2496.75+X 11 | C | (27/2-) | 115.26 6 | 100 | 2381.49+X | (25/2-) | ||
| 2589.7+X 3 | C | 705.1 3 | 100 | 1884.61+X | (21/2-) | |||
| 2677.89+X 12 | C | (29/2-) | 181.14 5 | 100 | 2496.75+X | (27/2-) | ||
| 2690.44+X 25 | C | (25/2) | 356.30 19 | 100 | 2334.14+X | (23/2) | ||
| 2705.16+X 23 | C | (25/2) | 371.02 17 | 100 | 2334.14+X | (23/2) | ||
| 2730.87+X 21 | C | (27/2-) | 285.98 15 624.5 4 | <130 100 17 | 2444.88+X 2106.40+X | (25/2-) (23/2-) | ||
| 2796.9+X 4 | C | 207.20 11 | 100 | 2589.7+X | ||||
| 2945.56+X 13 | C | (31/2-) | 267.67 5 | 100 | 2677.89+X | (29/2-) | ||
| 3096.0+X 4 | C | 299.06 16 | 100 | 2796.9+X | ||||
| 3284.17+X 15 | C | (33/2-) | 338.61 7 | 100 | 2945.56+X | (31/2-) | ||
| 3631.70+X 19 | C | (35/2-) | 347.53 11 | 100 | 3284.17+X | (33/2-) | ||
| 0.0+Y | C | (23/2) | ||||||
| 98.00+Y 15 | C | (25/2-) | 98.00 15 | 100 | 0.0+Y | (23/2) | ||
| 223.00+Y 20 | C | (27/2) | 125.00 12 | 100 | 98.00+Y | (25/2-) | ||
| 424.18+Y 22 | C | (29/2) | 201.18 10 | 100 | 223.00+Y | (27/2) | ||
| 670.97+Y 24 | C | (31/2) | 246.79 10 | 100 | 424.18+Y | (29/2) | ||
| 955.8+Y 3 | C | (33/2) | 284.82 13 | 100 | 670.97+Y | (31/2) | ||
| 1275.2+Y 3 | C | (35/2) | 319.45 14 | 100 | 955.8+Y | (33/2) | ||
| 1631.0+Y 5 | C | (37/2) | 355.8 3 | 100 | 1275.2+Y | (35/2) | ||
| 0.0+Z | C | (9/2-) | ||||||
| 300.59+Z 6 | C | (13/2-) | 300.59 6 | 100 | 0.0+Z | (9/2-) | ||
| 774.50+Z 10 | C | (17/2-) | 473.91 8 | 100 | 300.59+Z | (13/2-) | ||
| 1361.65+Z 15 | C | (21/2-) | 587.15 11 | 100 | 774.50+Z | (17/2-) | ||
| 1972.15+Z 21 | C | (25/2-) | 610.49 14 | 100 | 1361.65+Z | (21/2-) | ||
| 2623.7+Z 3 | C | (29/2-) | 651.60 19 | 100 | 1972.15+Z | (25/2-) | ||
E(level): From least-squares to Eγ, by evaluators.
Jπ(level): From (58Ni,p2nγ), except as noted. The values are based on transition multipolarities, deduced band structure, population strengths and comparison with band structure in heavier Ir isotopes.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - (π h11/2), α=+1/2 band. Proton probably coupled to | |||||||
| 436.04+X 4 | (13/2-) | ||||||
| 1115.95+X 5 | (17/2-) | ||||||
| 1823.44+X 11 | (21/2-) | 470.49 14 707.24 18 | 76 7 100 9 | 1353.07+X 1115.95+X | (19/2-) (17/2-) | ||
| 2444.88+X 16 | (25/2-) | 338.42 12 621.63 22 | 70 6 100 11 | 2106.40+X 1823.44+X | (23/2-) (21/2-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - (π h11/2), α=-1/2 band. See comment on signature partner | |||||||
| 0.0+X | (11/2-) | 1.2 s 1 % α = 54 5 % ε ≤ 46 5 % p ≤ 46 5 | |||||
| 633.90+X 4 | (15/2-) | ||||||
| 1353.07+X 7 | (19/2-) | 236.96 11 719.32 7 | 10.9 9 100 5 | Q | 1115.95+X 633.90+X | (17/2-) (15/2-) | |
| 2106.40+X 13 | (23/2-) | 282.83 16 753.35 14 | 30 3 100 7 | 1823.44+X 1353.07+X | (21/2-) (19/2-) | ||
| 2730.87+X 21 | (27/2-) | 285.98 15 624.5 4 | <130 100 17 | 2444.88+X 2106.40+X | (25/2-) (23/2-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 3 - π=-, ΔJ=1 band. Lowest-energy level feeds (21/2-) state. | |||||||
| 2326.71+X 15 | (23/2-) | ||||||
| 2381.49+X 10 | (25/2-) | ||||||
| 2496.75+X 11 | (27/2-) | 115.26 6 | 100 | 2381.49+X | (25/2-) | ||
| 2677.89+X 12 | (29/2-) | 181.14 5 | 100 | 2496.75+X | (27/2-) | ||
| 2945.56+X 13 | (31/2-) | 267.67 5 | 100 | 2677.89+X | (29/2-) | ||
| 3284.17+X 15 | (33/2-) | 338.61 7 | 100 | 2945.56+X | (31/2-) | ||
| 3631.70+X 19 | (35/2-) | 347.53 11 | 100 | 3284.17+X | (33/2-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 4 - ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds | |||||||
| 2008.47+X 12 | (21/2) | ||||||
| 2334.14+X 15 | (23/2) | ||||||
| 2705.16+X 23 | (25/2) | 371.02 17 | 100 | 2334.14+X | (23/2) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 5 - ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds | |||||||
| 0.0+Y | (23/2) | ||||||
| 98.00+Y 15 | (25/2-) | ||||||
| 223.00+Y 20 | (27/2) | 125.00 12 | 100 | 98.00+Y | (25/2-) | ||
| 424.18+Y 22 | (29/2) | 201.18 10 | 100 | 223.00+Y | (27/2) | ||
| 670.97+Y 24 | (31/2) | 246.79 10 | 100 | 424.18+Y | (29/2) | ||
| 955.8+Y 3 | (33/2) | 284.82 13 | 100 | 670.97+Y | (31/2) | ||
| 1275.2+Y 3 | (35/2) | 319.45 14 | 100 | 955.8+Y | (33/2) | ||
| 1631.0+Y 5 | (37/2) | 355.8 3 | 100 | 1275.2+Y | (35/2) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 6 - Possible (π h9/2), α=+1/2 band. Assignment of band to | |||||||
| 0.0+Z | (9/2-) | ||||||
| 300.59+Z 6 | (13/2-) | ||||||
| 774.50+Z 10 | (17/2-) | 473.91 8 | 100 | 300.59+Z | (13/2-) | ||
| 1361.65+Z 15 | (21/2-) | 587.15 11 | 100 | 774.50+Z | (17/2-) | ||
| 1972.15+Z 21 | (25/2-) | 610.49 14 | 100 | 1361.65+Z | (21/2-) | ||
| 2623.7+Z 3 | (29/2-) | 651.60 19 | 100 | 1972.15+Z | (25/2-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 7 - π=- band FRAGMENT. Lowest-energy level feeds (13/2-) GS band | |||||||
| 1365.77+X 8 | (17/2-) | ||||||
| 1609.30+X 6 | (19/2-) | ||||||
| 1884.61+X 7 | (21/2-) | 275.31 4 531 3 | 100 3 1.0 13 | 1609.30+X 1353.07+X | (19/2-) (19/2-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 8 - Band fragment. Lowest-energy level feeds (21/2-) state. | |||||||
| 2589.7+X 3 | |||||||
| 2796.9+X 4 | |||||||
| 3096.0+X 4 | 299.06 16 | 100 | 2796.9+X | ||||
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (1/2+) | 3.2 s +13-7 % ε = 85 2 % α = 15 2 | E(level): The low-spin isomeric state of 171Ir is shown here as the g.s., as suggested in 2002Ro17 and 2013An10 and supported by the observation in 167Ir and 169Ir of 1/2+ ground states and 11/2- isomers at 175.3 22 (1997Da07) and 153 24 (1999Po09), respectively. These systematics suggest E>0 but <200 for the 11/2- level in 171Ir. 2013An10 deduce an excitation energy of 168 keV from systematics. However, 1999Ba84, in their (58Ni,p2nγ) study, nominate their strongly populated h11/2 band to be the g.s. band; also, macroscopic-microscopic shell correction model calculations (1999Mu05) predict that the 11/2[505] bandhead is the g.s. in both 171Ir and 173Ir. Jπ(level): The low-spin isomeric state of 171Ir is shown here as the g.s., as suggested in 2002Ro17 and 2013An10 and supported by the observation in 167Ir and 169Ir of 1/2+ ground states and 11/2- isomers at 175.3 22 (1997Da07) and 153 24 (1999Po09), respectively. These systematics suggest E>0 but <200 for the 11/2- level in 171Ir. 2013An10 deduce an excitation energy of 168 keV from systematics. However, 1999Ba84, in their (58Ni,p2nγ) study, nominate their strongly populated h11/2 band to be the g.s. band; also, macroscopic-microscopic shell correction model calculations (1999Mu05) predict that the 11/2[505] bandhead is the g.s. in both 171Ir and 173Ir. |
| 0.0+X | (11/2-) | 1.2 s 1 % α = 54 5 % ε ≤ 46 5 % p ≤ 46 5 | %α: weighted average of 58 11 (1996Pa01) and 53 5 (2010An01). Other %α: ≈100 (1978Sc26). E(level): %α: weighted average of 58 11 (1996Pa01) and 53 5 (2010An01). Other %α: ≈100 (1978Sc26). (π h11/2), α=-1/2 band. See comment on signature partner. The low-spin isomeric state of 171Ir is shown here as the g.s., as suggested in 2002Ro17 and 2013An10 and supported by the observation in 167Ir and 169Ir of 1/2+ ground states and 11/2- isomers at 175.3 22 (1997Da07) and 153 24 (1999Po09), respectively. These systematics suggest E>0 but <200 for the 11/2- level in 171Ir. 2013An10 deduce an excitation energy of 168 keV from systematics. However, 1999Ba84, in their (58Ni,p2nγ) study, nominate their strongly populated h11/2 band to be the g.s. band; also, macroscopic-microscopic shell correction model calculations (1999Mu05) predict that the 11/2[505] bandhead is the g.s. in both 171Ir and 173Ir. Jπ(level): The low-spin isomeric state of 171Ir is shown here as the g.s., as suggested in 2002Ro17 and 2013An10 and supported by the observation in 167Ir and 169Ir of 1/2+ ground states and 11/2- isomers at 175.3 22 (1997Da07) and 153 24 (1999Po09), respectively. These systematics suggest E>0 but <200 for the 11/2- level in 171Ir. 2013An10 deduce an excitation energy of 168 keV from systematics. However, 1999Ba84, in their (58Ni,p2nγ) study, nominate their strongly populated h11/2 band to be the g.s. band; also, macroscopic-microscopic shell correction model calculations (1999Mu05) predict that the 11/2[505] bandhead is the g.s. in both 171Ir and 173Ir. T1/2(level): Weighted average of 1.14 s 5 (2014Pe02), 1.4 s 1 (2010An01), 1.15 s +13-11 (2002Ro17), 1.3 s 2 (1996Pa01), 1.0 s 3 (1967Si02), and 1.4 s 2 (1978Ca11). Others: 1.7 s 4 (1978Ca11), 1.6 s 1 (1978Sc26), 1.6 s 2 (1992Sc16). |
| 436.04+X | (13/2-) | E(level): (π h11/2), α=+1/2 band. Proton probably coupled to. | |
| 633.90+X | (15/2-) | E(level): (π h11/2), α=-1/2 band. See comment on signature partner. | |
| 1115.95+X | (17/2-) | E(level): (π h11/2), α=+1/2 band. Proton probably coupled to. | |
| 1353.07+X | (19/2-) | E(level): (π h11/2), α=-1/2 band. See comment on signature partner. | |
| 1365.77+X | (17/2-) | E(level): π=- band FRAGMENT. Lowest-energy level feeds (13/2-) GS band. | |
| 1609.30+X | (19/2-) | E(level): π=- band FRAGMENT. Lowest-energy level feeds (13/2-) GS band. | |
| 1823.44+X | (21/2-) | E(level): (π h11/2), α=+1/2 band. Proton probably coupled to. | |
| 1884.61+X | (21/2-) | E(level): π=- band FRAGMENT. Lowest-energy level feeds (13/2-) GS band. | |
| 2008.47+X | (21/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 2106.40+X | (23/2-) | E(level): (π h11/2), α=-1/2 band. See comment on signature partner. | |
| 2326.71+X | (23/2-) | E(level): π=-, ΔJ=1 band. Lowest-energy level feeds (21/2-) state. | |
| 2334.14+X | (23/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 2381.49+X | (25/2-) | E(level): π=-, ΔJ=1 band. Lowest-energy level feeds (21/2-) state. | |
| 2444.88+X | (25/2-) | E(level): (π h11/2), α=+1/2 band. Proton probably coupled to. | |
| 2496.75+X | (27/2-) | E(level): π=-, ΔJ=1 band. Lowest-energy level feeds (21/2-) state. | |
| 2589.7+X | E(level): Band fragment. Lowest-energy level feeds (21/2-) state. | ||
| 2677.89+X | (29/2-) | E(level): π=-, ΔJ=1 band. Lowest-energy level feeds (21/2-) state. | |
| 2705.16+X | (25/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 2730.87+X | (27/2-) | E(level): (π h11/2), α=-1/2 band. See comment on signature partner. | |
| 2796.9+X | E(level): Band fragment. Lowest-energy level feeds (21/2-) state. | ||
| 2945.56+X | (31/2-) | E(level): π=-, ΔJ=1 band. Lowest-energy level feeds (21/2-) state. | |
| 3096.0+X | E(level): Band fragment. Lowest-energy level feeds (21/2-) state. | ||
| 3284.17+X | (33/2-) | E(level): π=-, ΔJ=1 band. Lowest-energy level feeds (21/2-) state. | |
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 3631.70+X | (35/2-) | E(level): π=-, ΔJ=1 band. Lowest-energy level feeds (21/2-) state. | |
| 0.0+Y | (23/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 98.00+Y | (25/2-) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 223.00+Y | (27/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 424.18+Y | (29/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 670.97+Y | (31/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 955.8+Y | (33/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 1275.2+Y | (35/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 1631.0+Y | (37/2) | E(level): ΔJ=1, 3 quasi-particle band. Lowest-energy level feeds. | |
| 0.0+Z | (9/2-) | E(level): Possible (π h9/2), α=+1/2 band. Assignment of band to. | |
| 300.59+Z | (13/2-) | E(level): Possible (π h9/2), α=+1/2 band. Assignment of band to. | |
| 774.50+Z | (17/2-) | E(level): Possible (π h9/2), α=+1/2 band. Assignment of band to. | |
| 1361.65+Z | (21/2-) | E(level): Possible (π h9/2), α=+1/2 band. Assignment of band to. | |
| 1972.15+Z | (25/2-) | E(level): Possible (π h9/2), α=+1/2 band. Assignment of band to. | |
| 2623.7+Z | (29/2-) | E(level): Possible (π h9/2), α=+1/2 band. Assignment of band to. |
| E(level) | E(gamma) | Comments |
Identification: excitation functions for 162Er(19F,xn) and relative positions for α’s from known Ir activities (1967Si02).
For discussion of expected proton decay, see 1983Al09, 1984Al36, 1987ScZH, 1987ScZL and 1988MeZY.
Q-value: ΔS(n)=100; ΔQ(α)=13 (2017Wa10)
Q-value: S(2n)=20460 60; S(2p)=2580 40; Q(εp)=5210 40 (2017Wa10).