ADOPTED LEVELS, GAMMAS for 139I
Authors: P.K. Joshi, B. Singh, S. Singh, A.K. Jain | Citation: Nucl. Data Sheets 138, 1 (2016) | Cutoff date: 15-Oct-2016
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=7186 keV 29 | S(n)= 4550 keV 29 | S(p)= 10052 keV 29 | Q(α)= -1194 keV 29 | ||
| Reference: 2012WA38 |
| References: | |||
| A | 248Cm SF decay | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | A | (7/2+) | 2.280 s 11 % β- = 100 % β-n = 10.0 3 | |||||
| 209.5 10 | A | (5/2+) | 209.5 | 100 | 0.0 | (7/2+) | ||
| 418.6 9 | A | (9/2+) | 209? 418.6 | 5.0 25 100 5 | M1+E2 | 209.5 0.0 | (5/2+) (7/2+) | |
| 435.0 9 | A | (11/2+) | 435.0 | 100 | E2 | 0.0 | (7/2+) | |
| 816.0 10 | A | (13/2+) | 381.0 397.4 | 10.9 16 100 5 | D E2 | 435.0 418.6 | (11/2+) (9/2+) | |
| 928.9 12 | A | (15/2+) | 493.9 | 100 | E2 | 435.0 | (11/2+) | |
| 1280.5 12 | A | (17/2+) | 351.5 464.5 | 21.4 24 100 5 | E2 | 928.9 816.0 | (15/2+) (13/2+) | |
| 1564.5 14 | A | (19/2+) | 635.5 | 100 | E2 | 928.9 | (15/2+) | |
| 1762.0 14 | A | (21/2+) | 197.6 481.6 | 80 8 100 8 | M1+E2 E2 | 1564.5 1280.5 | (19/2+) (17/2+) | |
| 2035.7 15 | A | (23/2+) | 273.8 471.2 | 100 11 33 6 | (D+Q) (Q) | 1762.0 1564.5 | (21/2+) (19/2+) | |
| 2221.2 16 | A | (17/2:21/2) | 940.7 | 100 | 1280.5 | (17/2+) | ||
| 2316.1 17 | A | (19/2:23/2) | 751.6 | 100 | 1564.5 | (19/2+) | ||
| 2392.3 17 | A | (19/2:23/2) | 827.8 | 100 | 1564.5 | (19/2+) | ||
| 2490.8 17 | A | (25/2+) | 728.8 | 100 | (Q) | 1762.0 | (21/2+) | |
| 2688.5 18 | A | (27/2+) | 652.7 | 100 | 2035.7 | (23/2+) | ||
| 3332.3 7 | A | 643.8? | 100 | 2688.5 | (27/2+) | |||
Jπ(level): Above 210 keV excitation, all assignments are based on multipolarities of transitions and associated band structures. Ascending spins are assumed for levels populated in fission fragments following SF decay of 248Cm as the excitation energy rises
M(γ): From γγ(θ) and directional linear polarization measurements, except where noted
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 1 - GS band | |||||||
| 0.0 | (7/2+) | 2.280 s 11 % β- = 100 % β-n = 10.0 3 | |||||
| 435.0 9 | (11/2+) | 435.0 | 100 | E2 | 0.0 | (7/2+) | |
| 928.9 12 | (15/2+) | 493.9 | 100 | E2 | 435.0 | (11/2+) | |
| 1564.5 14 | (19/2+) | 635.5 | 100 | E2 | 928.9 | (15/2+) | |
| 2035.7 15 | (23/2+) | 273.8 471.2 | 100 11 33 6 | (D+Q) (Q) | 1762.0 1564.5 | (21/2+) (19/2+) | |
| 2688.5 18 | (27/2+) | 652.7 | 100 | 2035.7 | (23/2+) | ||
| 3332.3 7 | 643.8? | 100 | 2688.5 | (27/2+) | |||
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | I(γ) | M(γ) | Final Levels | |
| Band 2 - Band based on 9/2+ | |||||||
| 418.6 9 | (9/2+) | ||||||
| 816.0 10 | (13/2+) | 381.0 397.4 | 10.9 16 100 5 | D E2 | 435.0 418.6 | (11/2+) (9/2+) | |
| 1280.5 12 | (17/2+) | 351.5 464.5 | 21.4 24 100 5 | E2 | 928.9 816.0 | (15/2+) (13/2+) | |
| 1762.0 14 | (21/2+) | 197.6 481.6 | 80 8 100 8 | M1+E2 E2 | 1564.5 1280.5 | (19/2+) (17/2+) | |
| 2490.8 17 | (25/2+) | 728.8 | 100 | (Q) | 1762.0 | (21/2+) | |
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Conversion Coefficient | Additional Data |
| 418.6 | (9/2+) | 418.6 | M1+E2 | 0.0151 | α=0.0151 9, α(K)=0.0129 9, α(L)=0.00177 4, α(M)=0.000357 10, α(N)=7.17×10-5 16, α(O)=8.19E-6 17 | |
| 435.0 | (11/2+) | 435.0 | E2 | 0.01277 | α=0.01277, α(K)=0.01078 15, α(L)=0.001590 23, α(M)=0.000323 5, α(N)=6.45×10-5 9, α(O)=7.16E-6 10 | |
| 816.0 | (13/2+) | 397.4 | E2 | 0.01670 | α=0.01670, α(K)=0.01405 20, α(L)=0.00213 3, α(M)=0.000433 6, α(N)=8.62×10-5 12, α(O)=9.50E-6 14 | |
| 928.9 | (15/2+) | 493.9 | E2 | 0.00886 | α=0.00886, α(K)=0.00752 11, α(L)=0.001075 15, α(M)=0.000218 3, α(N)=4.36×10-5 7, α(O)=4.89E-6 7 | |
| 1280.5 | (17/2+) | 464.5 | E2 | 0.01055 | α=0.01055, α(K)=0.00894 13, α(L)=0.001296 19, α(M)=0.000263 4, α(N)=5.26×10-5 8, α(O)=5.87E-6 9 | |
| 1564.5 | (19/2+) | 635.5 | E2 | 0.00449 | α=0.00449, α(K)=0.00384 6, α(L)=0.000521 8, α(M)=0.0001051 15, α(N)=2.11×10-5 3, α(O)=2.41E-6 4 | |
| 1762.0 | (21/2+) | 197.6 | M1+E2 | 0.137 | α=0.137 25, α(K)=0.113 16, α(L)=0.019 7, α(M)=0.0040 15, α(N)=0.0008 3, α(O)=8.5×10-5 25 | |
| (21/2+) | 481.6 | E2 | 0.00952 | α=0.00952, α(K)=0.00807 12, α(L)=0.001160 17, α(M)=0.000235 4, α(N)=4.71×10-5 7, α(O)=5.27E-6 8 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | (7/2+) | 2.280 s 11 % β- = 100 % β-n = 10.0 3 | E(level): GS band. |
| 418.6 | (9/2+) | E(level): Band based on 9/2+. | |
| 435.0 | (11/2+) | E(level): GS band. | |
| 816.0 | (13/2+) | E(level): Band based on 9/2+. | |
| 928.9 | (15/2+) | E(level): GS band. | |
| 1280.5 | (17/2+) | E(level): Band based on 9/2+. | |
| 1564.5 | (19/2+) | E(level): GS band. | |
| 1762.0 | (21/2+) | E(level): Band based on 9/2+. | |
| 2035.7 | (23/2+) | E(level): GS band. | |
| 2490.8 | (25/2+) | E(level): Band based on 9/2+. | |
| 2688.5 | (27/2+) | E(level): GS band. | |
| 3332.3 | E(level): GS band. |
| E(level) | E(gamma) | Comments |
| 1762.0 | 197.6 | M(γ): from γγ(θ) and measured K-conversion coefficient |
139I first reported by 1949Su14 with a half-life of 2.7 s 1, the isotope formed in the fission process and followed by chemical separation.
Later studies of the decay of 139I include 1958Co72, 1959Pe28, 1971Kr22, 1971BrYH, 1972Sc48, 1973Ad04, 1974Ru07, 1974Kr21, 1974Gr29, 1975Kr17, 1975As04, 1975Al11, 1976Lu02, 1980Lu04, 1980Al15, 1981Ho07, 1982Al01, 1983En05, 1985Ro13, 1987RoZW, 1992Gr06, 1993Ru01, 1997Gr20
Precise mass measurement: 2013Va12 (mass excess=-68470.7 keV 40 CPT mass spectrometer)
Nuclear structure calculations: 2006Ks01: pairing plus quadrupole model
Q-value: S(2n)=8250 30, S(2p)=23010 300, Q(β-n)=3442 29 (2012Wa38)