ADOPTED LEVELS for ²⁹⁰Mc

Author: Balraj Singh  Citation: Nucl. Data Sheets 156, 70 (2019)  Cutoff date: 31-Jan-2019

Full ENSDF file

Q(β-)=-2300 keV SY	S(n)= 5840 keV SY	S(p)= 1960 keV SY	Q(α)= 10450 keV 50
Reference: 2017WA10

References:
A	294Ts α decay (51 MS)

E(level) (keV)	XREF	T1/2(level)
0	A	0.65 s +49-20  % SF = ? % α ≈ 100

Additional Level data and comments:

E(level)

Comments

0

Eα=9.78-10.31 MeV from the decay of 290Mc (2017Og01 and 2015Og05 reviews). Measurements: 10.31 MeV 4 (2014Kh04); 10.81-10.97 MeV (2013Og04,2012Og06); 9.95 MeV 40 (2011Og04,2010Og01). E(level): assumed that the observed activity is associated with the g.s. of 290Mc. T1/2(level): from 2017Og01 and 2015Og05 reviews. Measurements: 1.3 s +23-5 (2014Kh04, also 0.75 s +61-23 by combining their data with those from 2013Og04); 0.24 s +28-7 (2013Og04,2012Og06); 16 ms +75-8 (2011Og04,2010Og01).

General Comments:

290Mc produced and identified as α daughter of 294Ts, the latter produced in three separate experiments, two experiments at FLNR-JINR-Dubna facility, in collaboration with several other labs, the first experiment reported in 2011Og04 and 2010Og01, and the second in 2013Og04 and 2012Og06 using 249Bk(48Ca,3n),E=243.7, 246.8, 251.7, 255.7 and 259.8 MeV reaction. The third experiment was performed and reported by 2014Kh04 at GSI facility using 249Bk(48Ca,3n), E=252.1, 254.0, 258.0 MeV reaction and Gas-filled Trans-Actinide Separator and Chemistry Apparatus (TASCA) system.

One EVR-α-SF correlated decay chain reported by 2011Og04, three by 2013Og04 and 2012Og06, and two by 2014Kh04, all starting with the decay of 294Ts and ending in SF-decaying 270Db nuclide in Dubna work (2013Og04, 2011Og04) and in SF-decaying 266Lr in GSI work (2014Kh04). 2011Og07 and 2012OgZZ are also related reports for the Dubna work. See Adopted Levels for 294Ts for details of above three studies.

For theoretical studies, consult Nuclear Science References (NSR) database at NNDC, BNL for 52 primary references dealing with the half-lives and other aspects of nuclear structure in this mass region

Q-value: Estimated uncertainties (2017Wa10): ΔQ(β-)=930, ΔS(n)=1040, ΔS(p)=880.

Q-value: S(2n)=13020 850 (syst,2017Wa10). S(2p)=5620 (theory,1997Mo25)

Q-value: Other Q(α): 10410 40 from Eα=9.78-10.31 (2017Og01 review).