Absence ofJπ,T=0+,1level excitations in residual nuclei from (π±,2N) reactions

Autor:	B. J. Lieb, H. O. Funsten, W. J. Kossler, H. S. Plendl, C. E. Stronach, V. G. Lind
Rok vydání:	1981
Předmět:	Nuclear reaction Physics Nuclear and High Energy Physics Pion Branching fraction Hadron Elementary particle Fermion Isotopes of boron Atomic physics Nucleon
Zdroj:	Physical Review C. 23:2150-2156
ISSN:	0556-2813
Popis:	Gamma-ray spectra taken in prompt coincidence with incident 180-MeV ..pi../sup +/, 220-MeV ..pi../sup -/, and 0-MeV ..pi../sup -/ on the self-conjugate targets /sup 12/C and /sup 32/S show that the cross sections/yields are equal to or near zero for production of the J/sup ..pi../,T = 0/sup +/,1 levels of the odd Z, odd N nuclei resulting from np removal. The 0-MeV ..pi../sup -/ results can be explained by selection rules governing one-step quasifree interactions, but the D(1232) region results cannot. This suggests that there may be additional restrictions upon the pion absorption mechanism.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ec48b17e30e8843b87a227eb021da32 https://doi.org/10.1103/physrevc.23.2150 Zobrazit plný text záznamu