Nuclear Data Sheets for A=213

An accelerator experiment for junior and senior high school students to improve students’ involvement in fundamental physics

“…There are various alpha-decay isotopes produced by the nuclear fusion reaction of an oxygen ( 18 O) beam and a gold ( 197 Au) target, and we can identify isotopes by measuring the kinetic energy of alpha particle from the decays, e.g. 6.5 MeV from 210 Fr [20]. To estimate the beam flux of Fr + , Group B measured the number of decay alpha particles by using the SSD, which has an energy that corresponds to that from Fr (figure 11).…”

“…Of these, few are short-lived, such as, 208 Fr (τ = 85.3 s) and 209 Fr (τ = 72.9 s), while others are long-lived, such as 210 Fr (τ = 275.3 s) and 211 Fr (τ = 268.3 s) [20,[22][23][24]. The number of Fr particles during beam irradiation is expressed as…”

Improved S factor of the C12(p,γ)N13Skowronski, Masha, Piatti et al. 2023Phys. Rev. C4000View full textAdd to dashboardCite

“…The 5 MV Pelletron accelerator of Felsenkeller Laboratory provided molecular H 2 + beam with proton energies ranging between E p = 350 and 670 keV. The beam energy of the accelerator was calibrated using the narrow E p = 991.86±0.03 keV [28] resonance in the 27 Al(p,γ) 28 Si reaction [29]. For the calibration, this res-…”

“…The absolute full-energy peak efficiency of all detector crystals was measured using point-like radioactive sources ( 137 Cs, 60 Co and 22 Na), with activities calibrated by the Physikalisch-Technische Bundesanstalt (PTB) to 1% accuracy. The efficiency curve was extended up to 10 MeV using the well-known 27 Al(p,γ) 28 Si resonance at proton energy E p = 992 keV [32]. For detector A the full-energy efficiency, corrected for the true coincidence summing effect (3%), at the γ-ray energy of interest for the 12 C(p,γ) 13 N reaction, ξ γ , was obtained through the analytic fit of experimental data as described in [33].…”

Deformation of Odd Nuclei 27Al, 31P and 35Cl in Single-Particle States

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Using the evolutionary approach recently developed by us, the shapes of odd s-d-shell 27 Al, 31 P and 35 Cl nuclei in the ground and singleparticle excited states have been extracted from the experimental data on the energies, spins, and parities of these states, as well as the measured probabilities of electromagnetic transitions between them. The key ingredient of our procedure is the evolutionary algorithm that evolves the population of the bad-quality data-fitting nuclear shapes to the high-quality data-fitting nuclear shapes.

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