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Antiproton Production in Ni+ni Collisions at 1.85 Gev/nucleon

LI, GQ; Ko, Che Ming. (American Physical Society, 1994)

Antiproton production in Ni+Ni collisions at 1.85 GeV/nucleon is studied in the relativistic Vlasov-Uehling-Uhlenbeck model. The self-energies of the antiproton are determined from the nucleon self-energies by the G-parity ...

Medium Effects on Kaon and Antikaon Spectra in Heavy-Ion Collisions

Fang, X. S.; Ko, Che Ming; Brown, G. E.; Koch, V. (American Physical Society, 1993)

In the linear chiral perturbation theory, both kaon and antikaon masses decrease in dense matter. There is also a repulsive vector potential for the kaon and an attractive one for the antikaon. With these effects included ...

P(t) Dependence of Transverse Flow in Relativistic Heavy-Ion Collisions

Li, Bao-An; Ko, Che Ming; Li, GQ. (American Physical Society, 1996)

The strength of transverse flow is examined as a function of transverse momentum p(t) using a simple, transversely moving thermal model and a more realistic, relativistic transport model. It is shown that the p(t) dependence ...

K+ production in baryon-baryon and heavy-ion collisions

Li, GQ; Ko, Che Ming; Chung, WS. (American Physical Society, 1998)

Kaon production cross sections in nucleon-nucleon, nucleon-Delta, and Delta-Delta interactions are studied in a boson exchange model. For the latter two interactions, the exchanged pion can be on-mass shell

The N-14(Be-7,B-8)C-13 reaction and the Be-7(p,gamma)B-8 S factor

Azhari, A.; Burjan, V.; Carstoiu, F.; Gagliardi, Carl A.; Kroha, V.; Mukhamedzhanov, AM; Tang, X.; Trache, L.; Tribble, Robert E. (American Physical Society, 1999)

The N-14(Be-7,B-8)C-13 reaction was studied using an 85 MeV Be-7 radioactive beam. The asymptotic normalization coefficients for the virtual transitions Be-7+pB-8 were determined from the measured cross section. These ...

Fragmentation Barriers of Toroidal and Bubble Nuclei

Xu, HM; Gagliardi, Carl A.; Tribble, Robert E.; Wong, C. Y. (American Physical Society, 1994)

With an improved Boltzmann-Uehling-Uhlenbeck model, the deformation energy surfaces in reactions leading to the formation of toroidal and bubble nuclei are examined for central Mo-92+Mo-92 collisions. We found that the ...

Probing the softest region of the nuclear equation of state

Li, Ba; Ko, Che Ming. (American Physical Society, 1998)

An attractive, energy-dependent mean-field potential for baryons is introduced in order to generate a soft region in the nuclear equation of state, as suggested by recent lattice QCD calculations of baryon-free matter at ...

Giant monopole resonance strength in Ca-40

Youngblood, David H.; Lui, YW; Clark, HL. (American Physical Society, 1997)

The giant resonance region in Ca-40 was studied with inelastic scattering of 240 MeV alpha particles at small angles including 0 degrees. A peak at E-x = 17.5 +/- 0.4 MeV with Gamma = 4.95 +/- 0.25 MeV was found to contain ...

Effects of (N)over-Barn Polarization on Vector-Meson Masses at Finite-Temperature

Song, C. S.; Xia, P. W.; Ko, Che Ming. (American Physical Society, 1995)

Effects of (N) over bar N polarization on vector meson (rho and omega) masses at finite temperature are studied. Including a reduced nucleon mass in a hot matter, we find that the reduction of vector meson masses due to ...

Spectra and magnetic properties of large spins in external fields

Kalatsky, V. A.; Pokrovsky, Valery L. (American Physical Society, 1999)

Spectra and magnetic properties of large spins J (e.g., spins possessed by ions or molecules), placed into a crystal electric field (CEF) of an arbitrary symmetry point group, are shown to change drastically when J changes ...