ADOPTED LEVELS, GAMMAS for 33Na
Authors: Jun Chen and Balraj Singh | Citation: Nucl. Data Sheets 199, 1 (2025) | Cutoff date: 30-Sep-2024
Full ENSDF file | Adopted Levels (PDF version)
| Q(β-)=1.882×104 keV 45 | S(n)= 2.93×103 keV 45 | S(p)= 20510 keV SY | Q(α)= -1.879×104 keV 69 | ||
| Reference: 2021WA16 |
| References: | |||
| A | 9Be(38Si,33NaG) | B | 12C(34Na,33NaG) |
| C | C(36Mg,33NaG) | ||
| E(level) (keV) | XREF | Jπ(level) | T1/2(level) | E(γ) (keV) | Final Levels | |
| 0 | ABC | (3/2+) | 8.1 ms 3 % β- = 100 % β-n = 47 6 % β-2n = 13 3 % B-3N = ? % B-4N = ? | |||
| 427 5 | ABC | (5/2+) | 427 5 | 0 | (3/2+) | |
| 1115 8 | A C | (7/2+) | 688 6 | 427 | (5/2+) | |
| 1875 15 | C | (9/2+) | 760 13 | 1115 | (7/2+) | |
E(level): From Eγ data
Jπ(level): From shell-Model calculations using the SPDF-M effective interaction (2014Do05, 2011Ga15), unless otherwise noted.
E(γ): From 9Be(38Si,33Naγ)
| E(level) (keV) | Jπ(level) | T1/2(level) | E(γ) | Final Levels | |||
| Band 1 - Possible Kπ=(3/2+) band. | |||||||
| 0 | (3/2+) | 8.1 ms 3 % β- = 100 % β-n = 47 6 % β-2n = 13 3 % B-3N = ? % B-4N = ? | |||||
| 427 5 | (5/2+) | 427 5 | 0 | (3/2+) | |||
| 1115 8 | (7/2+) | 688 6 | 427 | (5/2+) | |||
| 1875 15 | (9/2+) | 760 13 | 1115 | (7/2+) | |||
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | (3/2+) | 8.1 ms 3 % β- = 100 % β-n = 47 6 % β-2n = 13 3 % B-3N = ? % B-4N = ? | Theoretical T1/2=11.8 ms, %β-n=92.6, 93.9; %β-2n=3.98, 3.56; %β-3n=1.29, 1.07; %β-4n=0 (2021Mi17, two values for different fission barriers). E(level): Theoretical T1/2=11.8 ms, %β-n=92.6, 93.9; %β-2n=3.98, 3.56; %β-3n=1.29, 1.07; %β-4n=0 (2021Mi17, two values for different fission barriers). Possible Kπ=(3/2+) band. |
| 427 | (5/2+) | XREF: B(467). E(level): Possible Kπ=(3/2+) band. | |
| 1115 | (7/2+) | For a possible 1117-keV transition to the g.s., branching ratio is calculated as 4.2% (2011Ga15), too weak to be seen in the work of 2011Ga15. E(level): For a possible 1117-keV transition to the g.s., branching ratio is calculated as 4.2% (2011Ga15), too weak to be seen in the work of 2011Ga15. Possible Kπ=(3/2+) band. | |
| 1875 | (9/2+) | E(level): Possible Kπ=(3/2+) band. |
| E(level) | E(gamma) | Comments |
| 427 | 427 | E(γ): weighted average of 429 5 from (38Si,33Naγ) and 425 5 from (36Mg,33Naγ). Other: 467 13 from (34Na,33Naγ) seems discrepant. |
| 1115 | 688 | E(γ): other: 690 13 from (36Mg,33Naγ) is in agreement with the adopted values, but less precise. |
1972Kl04: first identification and production of 32Na nuclide in U(p,X) reaction at E=24 GeV, CERN-ISOLDE facility. Measured isotopic half-life. Later publications from the same laboratory dealing with spectroscopic measurements: 1978De39, 1984Gu19
Mass measurements: 2012Ga45, 2007Ju03, 1991Or01
Measurement of mean square radii using 33Na beam: 2006Kh08
Production and cross section measurements: 1979We10, 1991Or01, 1997Ha11, 1998NoZW (also 1998NoZZ,1999YoZW), 2002Ra16 (also 2004Co29).
Structure calculations:
2022Ot01: calculated nuclear moments
2020Ts03,2014Ca21: calculated levels, J, π
1994Po05: calculated levels, binding energies
33Ne is particle unstable thus does not decay by β- to 33Na. 34Ne possibly decays by delayed-neutron decay to 33Na but no details are known about this mode. The 35Ne nuclide which could possibly decay by delayed-two neutron decay to 33Na has not been identified.
This nuclide is of possible relevance to "island of inversion " near n=20.
Q-value: ΔS(p)=680 (syst,2021Wa16)
Q-value: S(2n)=4610 450, S(2p)=47640 700 (syst), Q(β-n)=16540 450 (2021Wa16). Q(β-2n)=10760 450, Q(β-3n)=8450 450, Q(β-4n)=2110 450, deduced by the evaluators from relevant masses in 2021Wa16.