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Proton(p) and two-proton(2p) emissions from the proton-rich nuclei with 10≤Z≤20 have been explored by the in-fight decay and implantation decay methods, respectively, in a series of experiments at the HIRFL-RIBLL facility. The in-flight 2p emissions from the excited states of ~(28,29)S/~(26,27)P and ~(17,18)Ne were studied by complete-kinematics measurements. Mechanisms of 2p decay and related p-p correlations have been explored. Obvious 2p correlated emissions have been observed in the cases of ~(28,29)S but not in ~(27,28)P, indicating the 2p halo plays an important role in the diproton emission. In the ~(17,18)Ne cases, a small 2p opening angles were deduced by the HBT analyses, implying the BCS-BEC crossover may occur in the dilute nuclear matter. Moreover,~(27)S/~(26)P/~(25)Si,~(22)Si/~(20)Mg,~(23)Si/~(22)Al/~(21)Mg,~(24)Si/~(23)Al, and ~(36,37)Ca were implanted in a thin double-sided-silicon-strip detector and their β-delayed p and 2p decays have been measured by a surrounding silicon detector array under the continuous-beam mode. Important information on the nuclear spectroscopy, such as energy, lifetime, branching-ratio, and so on, has been extracted, which helps us to understand the nuclear structures of proton-rich exotic nuclei close to the drip-line.
Proton (p) and two-proton (2p) emissions from the proton-rich nuclei with 10≤Z≤20 have been explored by the in-fight decay and implantation decay methods, respectively, in a series of experiments at the HIRFL-RIBLL facility. The in-flight 2p emissions from the excited states of ~ (28,29) S / ~ (26,27) P and ~ (17,18) Ne were studied by complete-kinematics measurements. Mechanisms of 2p decay and related pp correlations have been explored. Obvious 2p correlated emissions have been observed in the cases of ~ (28,29) S but not in ~ (27,28) P, indicating the 2p halo plays an important role in the diproton emission. In the ~ (17,18) Ne cases, a small 2p opening angles were deduced by the HBT analyzes, implying the BCS-BEC crossover may occur in the dilute nuclear matter. (25) Si, ~ (22) Si / ~ (20) Mg, ~ (23) Si / ~ (22) Al / ~ (21) Mg, ~ 24 Si / ~ 23 Al, 36, 37) Ca were implanted in a thin double-sided-silicon-strip detector and their β-delayed p and 2 p decays have been measured by a surroundi ng silicon detector array under the continuous-beam mode. Important information on the nuclear spectroscopy, such as energy, lifetime, branching-ratio, and so on, has been extracted, which helps us to understand the nuclear structures of proton-rich exotic nuclei close to the drip-line.