ADOPTED LEVELS for 252Md
Authors: A.M. Mattera, S. Zhu, A.B. Hayes, E.A. Mccutchan | Citation: Nucl. Data Sheets 172, 543 (2021) | Cutoff date: 1-Jan-2021
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=-2360 keV SY | S(n)= 6530 keV SY | S(p)= 2730 keV SY | Q(α)= 7790 keV SY | ||
Reference: 2017WA10 |
References: | |||
A | 256Lr α decay |
E(level) (keV) | XREF | T1/2(level) |
0.0 | 2.3 m 8 % ε ≤ 100 | |
≈49 | A | |
≈158 | A | |
≈204 | A | |
≈246 | A | |
≈287 | A | |
≈359 | A |
E(level): Excited level energies are calculated from the α energies measured in 256Lr decay and Q(α)(256Lr)≈8810, obtained by 2017Wa10 from Q(α) systematics. 2017Wa10 estimate ΔQ(α)=140.
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0.0 | 2.3 m 8 % ε ≤ 100 | No α decay from 252Md was observed by 1973Es01 and 1965Do09. The α decay of 252Fm was observed by 1965Do09 and 1973Es01 following ε decay of 252Md. No upper limit was given for detection of any α from 252Md g.s. was given. E(level): No α decay from 252Md was observed by 1973Es01 and 1965Do09. The α decay of 252Fm was observed by 1965Do09 and 1973Es01 following ε decay of 252Md. No upper limit was given for detection of any α from 252Md g.s. was given. |
Assignment: 243Am(13C,4n) reaction (1973Es01), 238U(19F,5n) reaction (1965Do09), parent of 252Fm (7039-keV α from 252Fm) (1965Do09,1973Es01).
Measured mass excess = 80467 keV 89 (stat) 22 (syst) using multi-reflection tof (2018It04).
Q-value: ΔQ(β-)=130, ΔS(n)=130, ΔS(p)=130, ΔQ(α)=140 (2017Wa10)
Q-value: S(2n)=14260 (syst) 330; S(2p)=7290 (syst) 160 (2017Wa10)