Inelastic scattering of 100 MeV protons from Mg and Si using a Ge(Li) total absorption proton counter

Nuclear gamma-rays from energetic particle interactions

“…These data are 'shown by the open square and triangle in Figure 8. These measurements are consistent with estimates of the total 1.369 MeV emission mode from the meas urements of Crawley and Garvey (1967) and Horowitz et al (1969), using the branching ratios given by de Meijer, Drentje and Plendl (1975) and Endt and Van der Leun (1973). These estimates suggest that the contribution of the cascades from the first 10 excited state s out of about 40 bound states is about equal to the contribution of the direct excitation of the first excited level.…”

“…MeV is from Duray et al (1972), at 5.4-to 7 MeV from Seward (1959, at 12 MeV from Conzdtt (1957), at 17.5 MeV from Crawley and Garvey (1967), at 40 MeV from Stoval and Hintz (1964), and at 100 MeV from Horowitz et al (1969).…”

“…The cross section for proton excitation of this level, measured from 12 to 15 MeV by Shotter, Fishdr and Scott (1970), at 175 MeV, Crawley and Garvey (1967) and at 100 MeV by Horowitz et al (1969), is roughly 17% of that for excitation of 2 8 Si(p,p'y ) 28 i Using the branching ratios of de Meijer et al (1975) and assuming a 20% cascade contribution from higher levels we estimate the 6.878 and 5.099 MeV gamma-ray production cross sections to be, respectively, 13% and 6% of that for 1.779 MeV gamma-rays in Figure 10 reaction, we take a factor of 2 for the ratio of the cross 28 28Si8 <sectibns of the reactions 2 8 Si(aa'y.779)2 and 28si(t') 28Si 1 "779 at energies well above the Coulomb barrier energy.…”

Probing negative-parity states of Mg24 probed with proton and α inelastic scattering

“…For the 4 + 1 state, the DWBA cross sections are two orders smaller than the CC cross sections. Experimental data are cross sections at E p = 40 MeV [15,16], 49 MeV [13], 65 MeV [17,70], and 100 MeV [18,70]. state, the CC effect somewhat suppresses the cross sections but the effect is not as large as in the 1 − 1 and 4 + 2 cases.…”

“…The band structure of 24 Mg has been studied via electromagnetic transitions [1][2][3], and intensively investigated through inelastic scattering of various probes, including electrons [4][5][6][7][8][9][10], pions [11], nucleons [12][13][14][15][16][17][18][19][20][21][22][23], 3 He [24,25], and α [25][26][27][28][29]. For inelastic hadron scattering off 24 Mg, detailed reaction analyses have been performed using the distorted-wave Born approximation (DWBA) and coupled-channel (CC) calculations.…”