We briefly reviewed and summarized the experimental study on β-delayed proton decays published by our group over the last 8 years, namely the experimental observation of β-delayed proton decays of nine new nuclides in the rare-earth region near the proton drip line and five nuclides in the mass 90 region with N ∼ Z by utilizing the p-γ coincidence technique in combination with a He-jet tape transport system. In addition, important technical details of the experiments were provided. The experimental results were compared to the theoretical predictions of some nuclear models, resulting in the following conclusions. (1) The experimental half-lives for 85 Mo, 92 Rh, as well as the predicted "waiting point" nuclei 89 Ru and 93 Pd were 5-10 times longer than the macroscopic-microscopic model predictions of Möller et al. [At. Data Nucl. Data Tables 66, 131 (1997)]. These data considerably influenced the predictions of the mass abundances of the nuclides produced in the rp process.(2) The experimental assignments of spin and parity for the drip-line nuclei 142 Ho and 128 Pm could not be well predicted by any of the nuclear models. Nevertheless, the configuration-constrained nuclear potential-energy surfaces calculated by means of a Woods-Saxon-Strutinsky method could reproduce the assignments. (3) The ALICE code overestimated by one or two orders of magnitude the production-reaction cross sections of the nine studied rare-earth nuclei, while the HIVAP code overestimated them by approximately one order of magnitude.

Mass excesses of short-lived A=2Z-1 nuclei (63)Ge, (65)As, (67)Se, and (71)Kr have been directly measured to be -46,921(37), -46,937(85), -46,580(67), and -46,320(141)  keV, respectively. The deduced proton separation energy of -90(85)  keV for (65)As shows that this nucleus is only slightly proton unbound. X-ray burst model calculations with the new mass excess of (65)As suggest that the majority of the reaction flow passes through (64)Ge via proton capture, indicating that (64)Ge is not a significant rp-process waiting point.

HIRFL was upgraded from beginning 2000. Besides of researches on nuclear physics, atomic physics, irradiative material and biology, the cancer therapy by heavy ion and hadron physics are being developing. The injector system of SFC+SSC can provide all ions from proton to uranium with higher intensity. The Cooling Storage Ring (CSR) has accelerated beams successful. The ions 12 C 6+ , 36 Ar 18+ , 129 Xe 27+ have been accelerated up 1000MeV/u, 235MeV/u with about 10 9 ∼10 8 ions per spill respectively. The beam momentum dispersion was measured from 4×10 −3 to 2×10 −4 after cooling by the electron cooler or ∼4×10 −4 after accelerated to 1000MeV/u without cooling. In order to improve the nuclear structure and heavy isotope research in SFC+SSC energy domain, A Wien filter was added in front of RIBLL and gas was filled in first section of RIBLL; a new spectrometry SHANS has being installed. Presently, there are two starting version experimental setups at CSR.

No abstract