A5107336250- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- Astronomical and nuclear sciences
- Atomic and Molecular Physics
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Quantum, superfluid, helium dynamics
- High-pressure geophysics and materials
- Advanced NMR Techniques and Applications
- Neutrino Physics Research
- Advanced Chemical Physics Studies
- Astro and Planetary Science
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Boron Compounds in Chemistry
China Academy of Engineering Physics
2023
Peking University
2018-2022
State Key Laboratory of Nuclear Physics and Technology
2018-2022
China Institute of Atomic Energy
2020
α particles in stable nuclei Decay is a common mode of radioactivity heavy elements such as uranium that entails the loss comprising two protons and neutrons. Despite more than century study, when where these form unstable alike remains an open question. Tanaka et al. bombarded series tin isotopes with high-energy detected ejected at abundance inversely correlated mass number (see Perspective by Hen). This observation, relating particle accumulation to neutron skin thickness nuclear surface,...
An inelastic excitation and cluster-decay experiment $^{2}\mathrm{H}(^{16}\mathrm{C},^{4}\mathrm{He}+^{12}\mathrm{Be}\text{ }\text{or}\text{ }^{6}\mathrm{He}+^{10}\mathrm{Be})^{2}\mathrm{H}$ was carried out to investigate the linear-chain clustering structure in neutron-rich $^{16}\mathrm{C}$. For first time, decay paths from $^{16}\mathrm{C}$ resonances various states of final nuclei were determined, thanks well-resolved $Q$-value spectra obtained threefold coincident measurement. The...
Abstract The shape and internal structure of an atomic nucleus can change significantly with increasing excitation energy, angular momentum, or isospin asymmetry. As example this structural evolution, linear-chain configurations in carbon heavier isotopes have been predicted for decades. Recent studies found non-stability 12 C while evidenced its appearance 16 C. It is then necessary to investigate the molecular structures 14 clarify exact location on nuclear chart where begins emerge, thus...
Background: Beta-decay spectroscopy provides valuable nuclear physics input for thermonuclear reaction rates of astrophysical interest and stringent test shell-model theories far from the stability line. Purpose: The available decay properties proton drip-line nucleus $^{27}$S is insufficient to constrain key resonance in $^{26}$Si$(p,\gamma)^{27}$P rate probe possible isospin asymmetry. scheme complicated being understood, which has motivated but also presented challenges our experiment....
Measurements of the 2H(16C,16C∗→4He+12Be or 6He+10Be)2H inelastic excitation and cluster-decay reactions have been carried out at a beam energy about 23.5 MeV/u. A specially designed detection system, including one multilayer silicon-strip telescope around zero degrees, has allowed high-efficiency threefold coincident therefore event-by-event determination unstable nucleus beam. The decay paths from 16C resonances to various states final 10Be 12Be are recognized thanks well-resolved Q-value...
New measurements of proton/deuteron elastic and inelastic scattering to the ${2}_{1}^{+}$ state neutron-rich nucleus $^{16}\mathrm{C}$ have been performed at Radioactive Ion Beam Line in Lanzhou (RIBLL) inverse kinematics. The angular distributions were well reproduced by systematic optical potential with normalization factors for depths real imaginary parts. neutron proton deformation lengths ${\ensuremath{\delta}}_{n}=1.25\ifmmode\pm\else\textpm\fi{}0.30$ fm...
The mass of $^{27}$P was predicted to impact the X-ray burst (XRB) model predictions light curves and composition ashes. To address uncertainties inconsistencies in reported masses literature, a wealth information has been extracted from $\beta$-decay spectroscopy drip-line nucleus $^{27}$S. We determine most precise excess date be $-659(9)$~keV, which is 63~keV (2.3$\sigma$) higher than AME2016 recommended value $-722(26)$~keV. experimentally unknown $^{27}$S estimated 17030(400)~keV...
A multinucleon transfer and cluster-decay experiment, namely 9Be(13C,18O∗→14C+α)α, was performed at a beam energy of 65 MeV. Resonant states in 18O from 7 to 19 MeV, including some newly observed ones, are reconstructed with high resolution, based on the coincident detection various combinations final fragments. The α-decay branching ratios for 14 extracted both invariant-mass missing-mass measurements. Angular correlation analysis conducted 10.3-MeV (4+) state. present work supports...
$\beta$ decay of $^{26}$P was used to populate the astrophysically important $E_x=$5929.4(8) keV $J^{\pi}=3{^+}$ state $^{26}$Si. Both $\beta$-delayed proton at 418(8) and gamma ray 1742(2) emitted from this were measured simultaneously for first time with corresponding absolute intensities 11.1(12)\% 0.59(44)\%, respectively. Besides, shell model calculations weakly bound effects performed investigate properties other resonant states a spin-parity $4^+$ rather than $0^+$ favored...
Experimental results of the $^{1}\mathrm{H}(^{13}\mathrm{B},d)^{12}\mathrm{B}$ transfer reaction to low-lying states in $^{12}\mathrm{B}$ are reported. The optical potential parameters for entrance channel extracted from elastic scattering $^{1}\mathrm{H}(^{13}\mathrm{B},\phantom{\rule{0.16em}{0ex}}p)$ measured same experiment, while those exit global ones. Spectroscopic factors associated with $p$-, $s$-, and $d$-wave neutron known by comparing deuteron angular distributions calculation...
We investigate the low-lying positive-parity states in $^{12}\mathrm{Be}$, which are populated by $^{2}\mathrm{H}(^{13}\mathrm{B}$, $^{3}\mathrm{He})$ reaction via $l=1$ proton transfer for first time using a radioactive beam $^{13}\mathrm{B}$ at 23 MeV/nucleon. Spectroscopic factors and excitation energies of these reasonable agreement with shell model predictions. Besides two bound states, we observe resonant state...
β decay of proton-rich nuclei plays an important role in exploring isospin mixing. The ^{26}P at the proton drip line is studied using double-sided silicon strip detectors operating conjunction with high-purity germanium detectors. T=2 isobaric analog state (IAS) 13 055 keV and two new high-lying states 380 11 912 ^{26}Si are unambiguously identified through β-delayed two-proton emission (β2p). Angular correlations protons emitted from excited populated by measured, which suggests that...
The $\ensuremath{\beta}$-delayed two-proton ($\ensuremath{\beta}2p$) decay of $^{27}\mathrm{S}$ was studied using a state-of-the-art silicon array and Clover-type HPGe detectors. An energy peak at 6372(15) keV with branching ratio 2.4(5)% in the decay-energy spectrum identified as transition via isobaric-analog state $^{27}\mathrm{P}$ to ground $^{25}\mathrm{Al}$ $\ensuremath{\beta}$ $^{27}\mathrm{S}$. Two-proton angular correlations were measured by study mechanism emission. Based on...
A detailed $\ensuremath{\beta}$-decay spectroscopic study of $^{22}\mathrm{Al}$ was performed at the Radioactive Ion Beam Line in Lanzhou. With $\ensuremath{\beta}\text{\ensuremath{-}}\ensuremath{\gamma}$-particle coincidence measurement by a high-resolution DSSD particle detection array and high efficiency $\ensuremath{\gamma}$-ray array, total eight excited states $^{22}\mathrm{Mg}$ fed Gamow-Teller transitions newly identified. The one-proton, two-proton, $\ensuremath{\alpha}$ decays IAS...
A new 11 Be(p,d) transfer reaction experiment is performed in inverse kinematics with a radioactive Be beam at 26.9A MeV. Three low-lying states, namely the 0 + ground state, 2 state Ex = 3.37 MeV, and multiplet around 6 MeV 10 Be, are populated by this one-neutron reaction. These three states clearly discriminated from Q-value spectrum, which rebuilt energies angles of recoil deuterons coincidence Be. spectroscopic factor for each extracted comparing experimental differential cross sections...
The study of the origin asymmetries in mirror β decay is extremely important to understand fundamental nuclear force and structure. experiment was performed at National Laboratory Heavy Ion Research Facility Lanzhou (HIRFL) measure β-delayed γ rays 26P by silicon array Clover-type high-purity Germanium (HPGe) detectors. Combining with results from its nucleus 26Na, asymmetry parameter δ ( ≡ft+/ft−− 1) determined be 46(13)% for transition feeding first excited state daughter nucleus. Our...
Abstract Two low-lying unbound states in 16 C are investigated by deuteron inelastic scattering inverse kinematics. Besides the 2 state at 5.45 MeV previously measured a 1 n knockout reaction, new resonant 6.89 is observed for first time. The angular distributions of these two well reproduced distorted-wave Born approximation (DWBA) calculation with an l = excitation. In addition, spin-parities discussed and tentatively assigned based on shell model calculations using modified YSOX interaction.
A 13B(d,d′) inelastic scattering experiment was carried out using a 23 MeV/nucleon 13B beam in order to search for the missing positive parity state with configuration of 12Bg.s.⊗d5/2 N=8 neutron-rich nucleus 13B, referred as d-wave neutron excitation state. Several states at energies 3.6(1), 4.2(1), 5.4(2), and 6.5(2) MeV were observed its energy spectra, which derived from angles scattered deuterons mass method. To determine each populated state, differential cross sections (DCSs) compared...
α-clustering strength at the surface of tin isotopes 112,116,120,124 Sn was measured by using quasifree (p, pα) reaction RCNP.By measuring scattered protons and α particles in coincidence, formation clusters clearly evidenced.Surface heavy nuclei provides a natural explanation for origin decay, may also impact neutron-skin thickness which plays an important role constraining nuclear symmetry energy.