ADOPTED LEVELS, GAMMAS for 44Ar
Authors: Jun Chen, Balraj Singh and John A. Cameron | Citation: Nucl. Data Sheets 112, 2357 (2011) | Cutoff date: 31-Jul-2011
Full ENSDF file | Adopted Levels (PDF version)
Q(β-)=3108.2 keV 17 | S(n)= 8735 keV 6 | S(p)= 1.564×104 keV 10 | Q(α)= -12260 keV 5 | ||
Reference: 2012WA38 |
References: | |||
A | 44Cl β- decay (0.56 S) | B | 45Cl β-n decay |
C | C(46K,pnγ) | D | 48Ca(3He,7Be) |
E | 48Ca(48Ca,44ArG) | F | Coulomb Excitation |
G | 208Pb(48Ca,xγ) |
E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
0 | ABCDEFG | 0+ | 11.87 m 5 % β- = 100 | |||||
750 30 ? | D | 0+ | ||||||
1157.97 11 | ABC EFG | 2+ | 4.7 ps 7 | 1158.11 12 | 100 4 | [E2] | 0 | 0+ |
1610 30 | D | (2+) | ||||||
2010.61 12 | AB F | (2+) | 1.5 ps 2 | 852.77 10 2010.18 18 | 100.0 21 68.8 21 | [M1,E2] [E2] | 1157.97 0 | 2+ 0+ |
2746.2 3 | A C E G | (4+) | 2.7 ps +25-20 | 1588.1 3 2747.0 8 | 100 8 47 8 | 1157.97 0 | 2+ 0+ | |
2975.90 16 | A | (0+:4+) | 965.32 12 1817.7 3 | 100 7 47 5 | 2010.61 1157.97 | (2+) 2+ | ||
3439 | DE G | (6+) | > 27.7 ps | 693 | 100 | [E2] | 2746.2 | (4+) |
3980 50 | D | |||||||
4430 40 | D | |||||||
4806.7 5 | A | (0+:4+) | 2796.0 4 | 100 | 2010.61 | (2+) | ||
5351.5 4 | A | (0+:4+) | 2375.6 3 3338.4 15 | 100 6 41 7 | 2975.90 2010.61 | (0+:4+) (2+) |
E(level): From least-squares to Eγ data for levels populated in γ-ray studies. Others are from reaction studies.
Jπ(level): Predicted from Shell Model calculations (1999Wa21,2000Fo03,1976Cr03) and systematics of even-even nuclei, unless otherwise noted.
T1/2(level): From the differential recoil distance Doppler shift method in 208Pb(48Ca,Xγ), unless otherwise noted
E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Additional Data |
1157.97 | 2+ | 4.7 ps 7 | 1158.11 12 | [E2] | B(E2)(W.u.)=6.3 10 |
2010.61 | (2+) | 1.5 ps 2 | 2010.18 18 | [E2] | B(E2)(W.u.)=0.51 7 |
3439 | (6+) | > 27.7 ps | 693 | [E2] | B(E2)(W.u.)<14 |
Additional Level Data and Comments:
E(level) | Jπ(level) | T1/2(level) | Comments |
0 | 0+ | 11.87 m 5 % β- = 100 | The rms charge radius (<r2>)1/2=3.4454 fm 22 from δ<r2>(38Ar,44Ar)=+0.289 fm2 9(stat) 81(syst) (2008Bl01, laser spectroscopy). Evaluated (<r2>)1/2=3.4454 fm 46 (2008 evaluation by I. Angeli available on http://cdfe.sinp.msu.ru). |
2746.2 | (4+) | 2.7 ps +25-20 | XREF: C(2610). |
3439 | (6+) | > 27.7 ps | XREF: d(3930). |
E(level) | E(gamma) | Comments |
1157.97 | 1158.11 | M(γ): Implied from Coulomb Excitation |
2010.61 | 852.77 | M(γ): Implied from Coulomb Excitation | 2010.18 | M(γ): Implied from Coulomb Excitation |
Other measurements:
T1/2 of 44Ar: 1970Hu11, 1969La16
Reaction cross sections and radii for f-p shell nuclei: 1997Li15
Mass measurement: 2003Bl17
2006Ro34: 2H(48Ca,X), measured production cross-section
2004De41: natCu(7Li,X), E=35 MeV, measured cross-section
2001Sc01: 1H(44Ar,44Ar’) E=33.0 MeV and 44Ar(p,p’) E=33.2 MeV, measured cross section, deduced B(E2)
2001Vo09: 48Ca(p,pα), populated ground state of daughter nucleus
1999Ai02: 44Ar beam from 55Mn fragmentation, Si(44Ar,X) studied.
1971Ar32: 232Th(40Ar,X), E=290 MeV, measured fragments isotopic yields.
Q-value: Note: Current evaluation has used the following Q record
Q-value: S(2n)=14393 6, S(2p)=29570 120 (2011AuZZ,2003Au03)
Q-value: Values in 2003Au03: Q(β-)=3140 40, S(p)=15790 160, Q(α)=-12330 140. Others are the same as in 2011AuZZ