ADOPTED LEVELS, GAMMAS for 48K
Author: Jun Chen | Citation: Nucl. Data Sheets 179, 1 (2022) | Cutoff date: 30-Nov-2021
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=11940.4 keV 8 | S(n)= 4643.8 keV 16 | S(p)= 14206.2 keV 14 | Q(α)= -14230 keV 90 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 48Ca(7Li,7Be) | B | 48Ca(14C,14N) |
| C | 198Pt(48Ca,xγ) | D | 238U(48Ca,xγ) |
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | I(γ) | M(γ) | Final Levels | |
| 0.0 | ABCD | 1(-) | 6.8 s 2 % β- = 100 % β-n = 1.14 15 | |||||
| 142.70 24 | D | (2-) | 21 ps 6 | 142.7 3 | 100 | 0.0 | 1(-) | |
| 279 | CD | (2-) | 5.3 ps 10 | 136.0 279.0 1 | <1.00 100 | (D) | 142.70 0.0 | (2-) 1(-) |
| ≈350? | B | |||||||
| 580? | A | |||||||
| 728 | CD | (3-) | 3.6 ps 7 | 449.0 1 585.0 10 728.0 | 100 2.5 8 <0.80 | (D) | 279 142.70 0.0 | (2-) (2-) 1(-) |
| ≈800? | B | |||||||
| ≈2100? | B | |||||||
| 2177 | CD | (5+) | 10 ns 3 | 1449.1 1 1898.0 2034.5 4 | 100 4 <0.48 2.9 7 | (M2) [E3] [E3] | 728 279 142.70 | (3-) (2-) (2-) |
| 3403.5 5 | D | (5-) | 2675.4 4 | 100 | 728 | (3-) | ||
| 3586.2 6 | D | (7+) | 1409.0 5 | 100 | 2177 | (5+) | ||
E(level): From a least-squares fit to γ-ray energies for levels with deexciting gammas
Jπ(level): As proposed by 2011Kr12 in 238U(48Ca,Xγ) based on comparisons of γ-decays with shell-model expectations, unless otherwise noted.
T1/2(level): From recoil-distance Doppler shift using plunger at PRISMA-CLARA facility (2011Kr12), unless otherwise noted
M(γ): From γ(asymmetry): W(in plane)/W(out of plane) in 198Pt(48Ca,Xγ) (2004IsZX), with parentheses added by evaluator
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) (keV) | Multipolarity | Additional Data |
| 2177 | (5+) | 10 ns 3 | 1449.1 1 | (M2) | B(M2)(W.u.)=0.036 +16-9 |
| (5+) | 10 ns 3 | 1898.0 | [E3] | B(E3)(W.u.)<0.07 | |
| (5+) | 10 ns 3 | 2034.5 4 | [E3] | B(E3)(W.u.)=0.17 +9-6 |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0.0 | 1(-) | 6.8 s 2 % β- = 100 % β-n = 1.14 15 | μ=-0.8997 45 (2014Pa45) Configuration=π2s1/2-1~#ν(pf) (2014Pa45) from comparison with shell-model calculations. |
| E(level) | E(gamma) | Comments |
| 2177 | 1449.1 | M(γ): Q from W(in plane)/W(out of plane) in 198Pt(48Ca,Xγ) (2004IsZX); Δπ=(yes) from level scheme |
Mass measurements: 2012La05 (M.E.=-32284.2 keV 8, penning trap), 1980Ma40 (M.E.=-32150 keV 50), 1978We14 (M.E.=-32117 keV 27), 1974KlZM
Other measurements:
2021Ko08: U(p,X) E=1 GeV at ISOLDE-CERN facility. Measured energy differences between atomic hyperfine transitions. Deduced isotope shift and charge radius.
2014Pa45,2014Kr04: E(p)=1.4 GeV at ISOLDE-CERN facility. Fragments separated and bunched by gas-filled Paul Trap (ISCOOL). Measured hyperfine spectra by collinear laser spectroscopy using COLLAPS at ISOLDE-CERN. Deduced spin, magnetic moment, rms charge radius.
2006Gu02: 48Ca(t,3He) E=129 MeV. Measured excitation, σ(E,θ). Deduced giant resonance features
1999Ai02: Si(48K,X) E≈38-80 MeV/nucleon. Measured σ. Deduced strong absorption radius
1997Li15: Si(48K,X) E=52-69 MeV/nucleon. Measured σ. Deduced absorption radius and neutron separation energy
Q-value: S(2n)=13013.2 11, S(2p)=3.313×104 10, Q(β-n)=1988.9 24 (2021Wa16)