N = 40时的形状同质异能：~（67）Co中质子入侵者的发现

$^{32}$Si和$^{29}$Al中的闯入结构

Intruder structures in $^{32}$Si and $^{29}$Al

本文利用熔合蒸发反应研究了$^{32}$Si和$^{29}$Al的高自旋闯入结构，通过Doppler shift寿命测量并结合壳模型计算，揭示了其跨壳激发机制。

Shape coexisistence and collective low-spin states in $^{112,114}$Sn studied with the $(p,p'γ)$ DSA coincidence technique

Proton-scattering experiments followed by the coincident spectroscopy of $γ$ rays have been performed at the Institute for Nuclear Physics of the University of Cologne to excite low-spin states in $^{112}$Sn and $^{114}$Sn, to determine their lifetimes and extract reduced transitions strengths $B(ΠL)$. The combined spectroscopy setup SONIC@HORUS has been used to detect the scattered protons and the emitted $γ$ rays of excited states in coincidence. The novel $(p,p'γ)$ DSA coincidence technique was employed to measure sub-ps nuclear level lifetimes. 74 level lifetimes $τ$ of states with $J = 0 …

$^{34}$Si结构中的跨壳激发组态

Cross-shell excited configurations in the structure of 34Si

通过$^{34}$Al的$β$衰变和$γ$-$γ$角关联分析研究了$^{34}$Si的跨壳激发态自旋组态，并利用FSU Hamiltonian与VS-IMSRG方法解释其入射态结构及$N=20$壳隙演化。

Evidence for shape coexistence in $^{98}$Mo

A $γγ$ angular correlation experiment has been performed to investigate the low-energy states of the nucleus $^{98}$Mo. The new data, including spin assignments, multipole mixing ratios and lifetimes reveal evidence for shape coexistence and mixing in $^{98}$Mo, arising from a proton intruder configuration. This result is reproduced by a theoretical calculation within the proton-neutron interacting boson model with configuration mixing, based on microscopic energy density functional theory. The microscopic calculation indicates the importance of the proton particle-hole excitation across the Z…

通过~（65，67）Fe的β衰变和深度非弹性反应研究~（65，67）Co的结构

Structure of 65,67Co studied through the beta decay of 65,67Fe and a deep-inelastic reaction

丰中子同位素65、67 Fe和65 Co已经在Louvain-La-Neuve的LISOL设施中通过质子诱导的238 U裂变产生。这些同位素的光束已被提取与高选择性的共振激光电离结合质量分离的装置。在阿贡国家实验室的64 Ni +238 U反应中，也出现了γ ast和近γ ast水平的65 Co。结合65 Fe和65 Co的β衰变和深非弹性反应的所有信息，可以研究65 Co的能级结构。完全建立了~（65）Fe、~（65）Co和~（67）Fe的衰变图和~（65）Co的稳定结构。65，67 Co的能级结构可以解释为核耦合态与基于低能质子入侵配置的能级共存的结果。

Shape coexistence in Sr isotopes

Sr isotopes are located in the mass region $A\approx 100$, where a very quick onset of nuclear deformation exists, being other notable examples of this area Yb, Zr, and Nb nuclei. The presence of the proton subshell closure $Z=40$ allows the existence of particle-hole excitations that produces low-lying intruder bands. Purpose: The goal of this work is the study of the nuclear structure of the even-even $^{92-102}$Sr isotopes through the accurate description of excitation energies, $B(E2)$ transition rates, nuclear radii and two-neutron separation energies. Method: The interacting boson model …

The structure of $^{36}$Ca under the Coulomb magnifying glass

Detailed spectroscopy of the neutron-deficient nucleus $^{36}$Ca was obtained up to 9 MeV using the $^{37}$Ca($p$,$d$)$^{36}$Ca and the $^{38}$Ca($p$,$t$)$^{36}$Ca transfer reactions. The radioactive nuclei, produced by the LISE spectrometer at GANIL, interacted with the protons of the liquid Hydrogen target CRYPTA, to produce light ejectiles (the deuteron $d$ or triton $t$) that were detected in the MUST2 detector array, in coincidence with the heavy residues %identified by a zero degree detection system. %States have been measured up to 9 MeV. Our main findings are: i) a similar shift in ene…

Sn118附近多种形状共存：首个03+寿命测量

Multiple shape coexistence near Sn118: First 03+ lifetime measurement

研究通过测量Sn118中03+态寿命，揭示了该区域多种形状共存现象，结合理论计算支持了不同形状在Sn同位素中的存在。

Migration of nuclear shell gaps studied in the d(24Ne,p gamma)25Ne reaction

The transfer of neutrons onto 24Ne has been measured using a reaccelerated radioactive beam of 24Ne to study the (d,p) reaction in inverse kinematics. The unusual raising of the first 3/2+ level in 25Ne and its significance in terms of the migration of the neutron magic number from N=20 to N=16 is put on a firm footing by confirmation of this state's identity. The raised 3/2+ level is observed simultaneously with the intruder negative parity 7/2- and 3/2- levels, providing evidence for the reduction in the N=20 gap. The coincident gamma-ray decays allowed the assignment of spins as well as the…