ADOPTED LEVELS for 256No
Author: Balraj Singh | Citation: Nucl. Data Sheets 141, 327 (2017) | Cutoff date: 22-Mar-2017
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=-3920 keV 80 | S(n)= 7056 keV 17 | S(p)= 4310 keV 10 | Q(α)= 8582 keV 5 | ||
| Reference: 2017WA10 |
| E(level) (keV) | Jπ(level) | T1/2(level) |
| 0.0 | 0+ | 2.91 s 5 % α = 99.47 6 % SF = 0.53 6 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 0+ | 2.91 s 5 % α = 99.47 6 % SF = 0.53 6 | %α(256No) is obtained from SF/α=0.0053 +6-3, measured by 1990Ho03. Any possible ε decay branch is taken as negligible: calculations of transition probability for an electron-capture branch from 256Md g.s. to the 256Fm g.s. yield I(ε)|<0.001% by requiring its log ft value to be |>5.8. E(level): %α(256No) is obtained from SF/α=0.0053 +6-3, measured by 1990Ho03. Any possible ε decay branch is taken as negligible: calculations of transition probability for an electron-capture branch from 256Md g.s. to the 256Fm g.s. yield I(ε)|<0.001% by requiring its log ft value to be |>5.8. |
1963Do12, 1964Do10: 256No produced in 238U(22Ne,4n) reaction and assigned as parent of 252Fm from α-decay study, measured half-life. Later studies: 1966Ku15, 1967Dr02, 1967Gh01, 1990Ho03.
Theoretical calculations: consult the Nuclear Science References (NSR) database for about 134 theory references.
2016Ro28, 2014Li15, 2013Af01, 2013Pr08, 2012Jo05: nuclear structure theory references
Q-value: S(2n)=13044 12, S(2p)=7659 8 (2017Wa10)