ADOPTED LEVELS, GAMMAS for 47Ar
Authors: S. Ota and E.A. Mccutchan | Citation: Nucl. Data Sheets 203, 1 (2025) | Cutoff date: 1-Apr-2025
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1.03447×104 keV 18 | S(n)= 3667 keV 3 | S(p)= 1.892×104 keV 10 | Q(α)= -15597 keV 5 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 2H(46Ar,p) | B | 9Be(48K,47ArG) |
| C | 12C(46Ar,47ArG) | D | 48Ca(238U,xγ) |
| E | Coulomb Excitation | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | Final Levels | |
| 0 | ABCDE | (3/2)- | 1.23 s 3 % β- = 100 % β-n < 0.2 | ||||
| 1200 6 | A D | (1/2-,3/2-) | 1200 6 | 100 | 0 | (3/2)- | |
| 1231.0 23 | BCDE | (5/2-) | 1231 3 | 100 | 0 | (3/2)- | |
| 1745.4 23 | ABCDE | (7/2)- | 515 3 1745 3 | | 1231.0 0 | (5/2-) (3/2)- | |
| 2187 5 | B DE | 955 6 2188 7 | | 1231.0 0 | (5/2-) (3/2)- | ||
| 2655 80 | A | ||||||
| 2762 3 | BC | 1017 4 1530 4 | | 1745.4 1231.0 | (7/2)- (5/2-) | ||
| 3335 80 | A | ||||||
| 3438 4 | C | 1692 5 3438 7 | | 1745.4 0 | (7/2)- (3/2)- | ||
| 3985 85 | A | ||||||
| 4790 95 | A | ||||||
| 5500 85 | A | 7/2+,9/2+ | |||||
| 6.20E+3 10 | A | ||||||
E(level): From a least-squares fit to Eγ, except where noted.
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 1200 | (1/2-,3/2-) | XREF: α(1130). | |
| 1231.0 | (5/2-) | B(E2)=0.0135 17 (2012Wi05) B(E2) value assumes that mult(1227γ)=E2. | |
| 1745.4 | (7/2)- | B(E2) < 0.0074 37 (2012Wi05). | |
| 2187 | B(E2) < 0.0020 10 (2012Wi05). | ||
| 2655 | E(level): From 2H(46Ar,p). | ||
| 3335 | E(level): From 2H(46Ar,p). | ||
| 3985 | E(level): From 2H(46Ar,p). | ||
| 4790 | E(level): From 2H(46Ar,p). | ||
| 5500 | 7/2+,9/2+ | E(level): From 2H(46Ar,p). | |
| 6.20E+3 | E(level): From 2H(46Ar,p). |
| E(level) | E(gamma) | Comments |
| 1200 | 1200 | E(γ): from (238U,Xγ) |
| 1231.0 | 1231 | E(γ): weighted average of 1231 4 in (46Ar,47Arγ), 1229 5 in (48K,47Arγ), 1227 6 in Coulomb excitation and 1234 4 in (238U,Xγ) |
| 1745.4 | 515 | E(γ): weighted average of 515 3 in (46Ar,47Arγ), 516 5 in (48K,47Arγ), and 516 4 in (238U,Xγ) | 1745 | E(γ): weighted average of 1744 5 in (46Ar,47Arγ), 1745 6 in (48K,47Arγ), and 1747 5 in (238U,Xγ) |
| 2187 | 955 | E(γ): from (48K,47Arγ) | 2188 | E(γ): weighted average of 2188 8 in (48K,47Arγ) and 2190 16 in (238U,Xγ) |
| 2762 | 1017 | E(γ): from (46Ar,47Arγ) | 1530 | E(γ): from (46Ar,47Arγ) |
| 3438 | 1692 | E(γ): from (46Ar,47Arγ) | 3438 | E(γ): from (46Ar,47Arγ) |
Mass excess measurements (with uncertainty of 1.2 keV) reported in 2020Mo25.
1995So03: 64Ni(48Ca,X) E=60 MeV/nucleon. 116 mg/cm2 target. Selection by LISE3 spectrometer. Additional energy loss selection (A3/Z2) by means of 220 μm wedge-shaped aluminum. Identification by ΔE-tof technique (two Si detectors). One Si detector served for implantation and detection of correlated β-decay. 4π 3He detector for neutrons.
2004Gr20,2003Gr22: Be(48Ca,X) E=60 MeV/nucleon. 530 μm-thick Be target; selection by LISE3 spectrometer. Particle identification by ΔE-tof technique. Residual energy measured in double-sided Si-strip implantation detector (DSSD). Measured β-’s (two plastic scintillators on either side of the DSDD).
2004We09: produced by a pulsed beam of 1.4 GeV protons from the PSB accelerator impinging on a standard ISOLDE uranium carbide graphite target, heated to about 1900|’ C. The reaction products diffused from the heated target and effused via a low-temperature, water-cooled transfer line to a standard FEBIAD MK-7 plasma ion source, where the ionization by plasma discharge took place. α tungsten converter was placed parallel to the target, allowing one to switch to the neutron irradiation of the target by changing the focus of the proton beam from the target to the converter. Measured Eγ, Eβ, Iγ, Iβ, γγ- and βγ-coin, and T1/2 using two Ge detectors and four 1.5-mm thick plastic detectors (for detecting β-’s).
Others: 1985Be50, 1985Gu14, and 1990Tu01
Q-value: S(2n)=11739.1 13; S(2p)=36605 (syst) 300; Q(β-n)=1975.3 14 (2021Wa16)