ADOPTED LEVELS:NOT OBSERVED for 33Ne
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-)=22350 keV SY | S(n)= -1060 keV SY | S(p)= 27390 keV CA | Q(α)= -21690 keV CA | ||
| Reference: 2021WA16,2019MO01 |
| E(level) (keV) | T1/2(level) |
| 0? | < 180 ns % n = ? |
Additional Level Data and Comments:
| E(level) | Jπ(level) | T1/2(level) | Comments |
| 0 | < 180 ns % n = ? | 33Ne g.s. is unbound towards neutron emission, according to non-observation of any events which could be assigned to 33Ne in the experimental studies by 2007Ba71, 2002Lu09, and 2002No11 carried out at RIKEN, RIKEN-GANIL-Dubna collaboration, and NSCL-MSU. Most likely this nucleus is unbound towards one-neutron emission, as S(n) is -1060 keV 780 (syst), and S(2n)=1190 660 (syst) (2021Wa16). E(level): 33Ne g.s. is unbound towards neutron emission, according to non-observation of any events which could be assigned to 33Ne in the experimental studies by 2007Ba71, 2002Lu09, and 2002No11 carried out at RIKEN, RIKEN-GANIL-Dubna collaboration, and NSCL-MSU. Most likely this nucleus is unbound towards one-neutron emission, as S(n) is -1060 keV 780 (syst), and S(2n)=1190 660 (syst) (2021Wa16). |
2002No11, 1997Sa14: 33Ne not seen in reaction: Ta(48Ca,X) E=64 MeV/nucleon. Reaction fragments analyzed by RIPS recoil fragment separator at RIKEN facility. Identification by measurements of energy loss, total kinetic energy, time-of-flight and magnetic rigidity for each fragment. Expected cross section for 33Ne, based on measured cross sections for 31F and 35Na, is ≈10 pb. This cross section should result in the observation of some events for 33Ne but none were seen.
2002Lu09, 2002Lu19: RIKEN-GANIL-Dubna collaboration. 33Ne not seen in reaction: Ta(48Ca,X) E=59.8 MeV/nucleon. Fragmentation of 48Ca primary beam. Reaction fragments analyzed by RIPS recoil fragment separator at RIKEN facility and LISE-2000 spectrometer at GANIL. Isotopic Identification by measurements of energy loss, total kinetic energy, time-of-flight and magnetic rigidity for each fragment. No events were observed for 33Ne.
2007Ba71: W(48Ca,Xγ) E=141 MeV/nucleon beam from the National Superconducting Cyclotron Laboratory (NSCL). The fragments were separated with the A1900 fragment separator. Isotopic identification by multiple ΔE signals, magnetic rigidity, total energy and time of flight analysis. Detectors: plastic scintillators, parallel-plate avalanche counters (PPACs) and silicon PIN diodes. No events could be assigned to 33Ne which confirmed this nucleus is unbound towards particle emission. The 34Ne nuclide is observed in this work as bound nucleus. The 33Ne nuclide should probably have been seen also if this were a bound nucleus.
Structure calculations:
2022Gu11: calculated single-particle levels
2022Su17, 2021In02, 2008Wi11, 2005Ch71, 2004Ge02: calculated binding energies, deformation parameter
2020Mi15: calculated energy of first 2+ level and B(E2)
Q-value: ΔQ(β-)=750, ΔS(n)=780 (syst,2021Wa16)
Q-value: Q(β-) and S(n) from 2021Wa16. S(p) and Q(α) are theoretical values from 2019Mo01.
Q-value: S(2n)=1190 660, Q(β-n)=19420 600 (syst,2021Wa16). S(2p)=51460 (2019Mo01, theory)