ADOPTED LEVELS, GAMMAS for 170Ir
Authors: C.M. Baglin, E.A. Mccutchan, S. Basunia{+1 | Citation: Nucl. Data Sheets 153, 1 (2018) | Cutoff date: 1-Oct-2018
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-7060 keV SY | S(n)= 9340 keV SY | S(p)= -74 keV SY | Q(α)= 6110 keV SY | ||
| Reference: 2017WA10 |
| References: | |||
| A | 174Au α decay (162.9 MS) | B | 174Au α decay (139 MS) |
| C | 112Sn(60Ni,pnγ) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | A | (3-) | 0.87 s +18-12 % α = 5.2 17 % ε = 94.8 17 | |||||
| 0+X | BC | (8+) | 811 ms 18 % α = 38 5 % IT ≤ 62 5 % ε ≤ 62 5 | |||||
| 152.5+X 2 | BC | (9+) | 152.5 2 | 100 | (M1) | 0+X | (8+) | |
| 190.56+X 24 | BC | (7-,8-,9-) | 190.7 4 | 100 | (E1) | 0+X | (8+) | |
| 370.19+X 10 | C | (-) | 218.4 2 370.1 1 | 82 9 ≈100 | 152.5+X 0+X | (9+) (8+) | ||
| 501.69+X 23 | C | (9-) | 131.5 2 | 100 | [M1,E2] | 370.19+X | (-) | |
| 768.91+X 24 | C | (10-) | 267.3 1 | 100 | [M1] | 501.69+X | (9-) | |
| 1041.52+X 25 | C | (11-) | 272.7 1 539.5 2 | 100 9 24 8 | 768.91+X 501.69+X | (10-) (9-) | ||
| 1382.5+X 3 | C | (12-) | 340.9 2 613.6 8 | 100 14 42 14 | 1041.52+X 768.91+X | (11-) (10-) | ||
| 1717.3+X 4 | C | (13-) | 335.0 2 675.9 3 | ≈100 72 24 | 1382.5+X 1041.52+X | (12-) (11-) | ||
| 2087.4+X 4 | C | (14-) | 370.1 1 704.5 3 | ≈100 54 23 | 1717.3+X 1382.5+X | (13-) (12-) | ||
E(level): From least-squares fit to measured Eγ.
Jπ(level): Values given without further comment are from 2007Ha45 in 112Sn(60Ni,pnγ) and are based on the authors’ deduced band structure and total Routhian surface calculations.
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - Possible (π 11/2[505])+(ν 1/2[660]) α=0 band. | |||||||
| 768.91+X 24 | (10-) | ||||||
| 1382.5+X 3 | (12-) | ||||||
| 2087.4+X 4 | (14-) | 370.1 1 704.5 3 | ≈100 54 23 | 1717.3+X 1382.5+X | (13-) (12-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - Possible (π 11/2[505])+(ν 1/2[660]) α=1 band. | |||||||
| 501.69+X 23 | (9-) | ||||||
| 1041.52+X 25 | (11-) | ||||||
| 1717.3+X 4 | (13-) | 335.0 2 675.9 3 | ≈100 72 24 | 1382.5+X 1041.52+X | (12-) (11-) | ||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 152.5+X | (9+) | 152.5 2 | (M1) | 1.84 | α=1.84 | |
| 190.56+X | (7-,8-,9-) | 190.7 4 | (E1) | 0.0769 | α=0.0769 12 | |
| 501.69+X | (9-) | 131.5 2 | [M1,E2] | 2.2 | α=2.2 7 | |
| 768.91+X | (10-) | 267.3 1 | [M1] | 0.385 | α=0.385 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (3-) | 0.87 s +18-12 % α = 5.2 17 % ε = 94.8 17 | E(level): Total routhian surface calculations (2007Ha45) indicate a γ-soft nucleus with β2≈0.15 and γ≈15|’ for the energetically most favored orbitals, namely, 11/2[505] (1h11/2), 3/2[420] (2d3/2) or 1/2[400] (3s1/2) for the 77th proton coupled to 3/2[521], 5/2[512], 7/2[514] (1h9/2) or 5/2[523] (2f7/2) or 1/2[660] (1i13/2) for the 93rd neutron. The isotopes 169Ir and 171Ir exhibit 1/2+ ground states and 11/2- isomers; the isotone 169Os has a possible 5/2- ground state based on its unhindered α decay to a probable 5/2[523] g.s. in 165W. If the Gallagher-Moszkowski rule is valid at this deformation, coupling a 1/2+ or 11/2- proton with a 5/2- neutron would result in low-lying 3- and 8+ levels, consistent with Jπ proposed by 2004GoZZ. However, these Jπ assignments must be considered highly tentative. Jπ(level): Total routhian surface calculations (2007Ha45) indicate a γ-soft nucleus with β2≈0.15 and γ≈15|’ for the energetically most favored orbitals, namely, 11/2[505] (1h11/2), 3/2[420] (2d3/2) or 1/2[400] (3s1/2) for the 77th proton coupled to 3/2[521], 5/2[512], 7/2[514] (1h9/2) or 5/2[523] (2f7/2) or 1/2[660] (1i13/2) for the 93rd neutron. The isotopes 169Ir and 171Ir exhibit 1/2+ ground states and 11/2- isomers; the isotone 169Os has a possible 5/2- ground state based on its unhindered α decay to a probable 5/2[523] g.s. in 165W. If the Gallagher-Moszkowski rule is valid at this deformation, coupling a 1/2+ or 11/2- proton with a 5/2- neutron would result in low-lying 3- and 8+ levels, consistent with Jπ proposed by 2004GoZZ. However, these Jπ assignments must be considered highly tentative. |
| 0+X | (8+) | 811 ms 18 % α = 38 5 % IT ≤ 62 5 % ε ≤ 62 5 | E(level): Total routhian surface calculations (2007Ha45) indicate a γ-soft nucleus with β2≈0.15 and γ≈15|’ for the energetically most favored orbitals, namely, 11/2[505] (1h11/2), 3/2[420] (2d3/2) or 1/2[400] (3s1/2) for the 77th proton coupled to 3/2[521], 5/2[512], 7/2[514] (1h9/2) or 5/2[523] (2f7/2) or 1/2[660] (1i13/2) for the 93rd neutron. The isotopes 169Ir and 171Ir exhibit 1/2+ ground states and 11/2- isomers; the isotone 169Os has a possible 5/2- ground state based on its unhindered α decay to a probable 5/2[523] g.s. in 165W. If the Gallagher-Moszkowski rule is valid at this deformation, coupling a 1/2+ or 11/2- proton with a 5/2- neutron would result in low-lying 3- and 8+ levels, consistent with Jπ proposed by 2004GoZZ. However, these Jπ assignments must be considered highly tentative. Jπ(level): Total routhian surface calculations (2007Ha45) indicate a γ-soft nucleus with β2≈0.15 and γ≈15|’ for the energetically most favored orbitals, namely, 11/2[505] (1h11/2), 3/2[420] (2d3/2) or 1/2[400] (3s1/2) for the 77th proton coupled to 3/2[521], 5/2[512], 7/2[514] (1h9/2) or 5/2[523] (2f7/2) or 1/2[660] (1i13/2) for the 93rd neutron. The isotopes 169Ir and 171Ir exhibit 1/2+ ground states and 11/2- isomers; the isotone 169Os has a possible 5/2- ground state based on its unhindered α decay to a probable 5/2[523] g.s. in 165W. If the Gallagher-Moszkowski rule is valid at this deformation, coupling a 1/2+ or 11/2- proton with a 5/2- neutron would result in low-lying 3- and 8+ levels, consistent with Jπ proposed by 2004GoZZ. However, these Jπ assignments must be considered highly tentative. |
| 501.69+X | (9-) | E(level): Possible (π 11/2[505])+(ν 1/2[660]) α=1 band. | |
| 768.91+X | (10-) | E(level): Possible (π 11/2[505])+(ν 1/2[660]) α=0 band. | |
| 1041.52+X | (11-) | E(level): Possible (π 11/2[505])+(ν 1/2[660]) α=1 band. | |
| 1382.5+X | (12-) | E(level): Possible (π 11/2[505])+(ν 1/2[660]) α=0 band. | |
| 1717.3+X | (13-) | E(level): Possible (π 11/2[505])+(ν 1/2[660]) α=1 band. | |
| 2087.4+X | (14-) | E(level): Possible (π 11/2[505])+(ν 1/2[660]) α=0 band. |
| E(level) | E(gamma) | Comments |
| 152.5+X | 152.5 | M(γ): based on strength of Ir K| x ray relative to I(153γ) in α-γ coin spectrum in 174Au α decay (811 ms) (2004GoZZ). |
| 190.56+X | 190.7 | E(γ): weighted average of 190.3 4 from (60Ni,pnγ) and 190.2 5 from 174Au α decay (811 ms). M(γ): based on absence of Ir K| x ray in α-γ coin spectrum in 174Au α decay (811 ms) (2004GoZZ). |
| 370.19+X | 370.1 | E(γ): for doublet.. Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
| 501.69+X | 131.5 | M(γ): not E1 from intensity balance at the 502+x level (α(exp)>1.5 assuming intraband 267.3γ is M1) in (60Ni,pnγ). |
| 1717.3+X | 335.0 | E(γ): for doublet; placement of other component unknown. |
| 2087.4+X | 370.1 | E(γ): for doublet.. Multiply placed with intensity suitably divided I(γ): Multiply placed with intensity suitably divided |
Levels: For calculated α decay branching ratios see 2017Zh03, 2016Sa16.
Q-value: ΔQ(β-)=ΔS(n)=ΔS(p)=90; ΔQ(α)=50 (2017Wa10).
Q-value: S(2n)=20836 (syst) 104; s(2p)=2143 (syst) 94; Q(εp)=7760 (syst) 90 (2017Wa10).