Spin alignment and resonance behavior in theMg24+24

Spin alignment of excited projectiles due to target spin-flip interactions

“…Spin alignment is found in a diverse number of reactions including inelastic scattering [1][2][3][4][5][6], deep elastic scatter ing [7][8][9][10], projectile fragmentation [11][12][13][14][15][16][17][18], fission [19,20], Coulomb excitation [21], and other direct reactions [22][23][24][25][26][27][28], For peripheral reactions, the dominant angular momentum in the reaction is the initial orbital angular momentum between the projectile and target, which is perpendicular to both the beam axis and the reaction plane. It is therefore not surprising that many fragments have their spin aligned, on av erage, parallel to this direction [7,11,12,[21][22][23]27], However, there are some cases where different alignments are found [13][14][15][16]18], Measurement of a fragment's spin alignment can be deduced from its decay products, including fi particles though NMR techniques [11,12], from the recoil induced by y-ray decay [23,2...…”

Clustering effects in48Cr composite nuclei produced via24Mg +24Mg reaction

“…Narrow resonance phenomena in the elastic and inelastic channels have been observed for the system 24 Mg + 24 Mg at high spin (J=34-36 ) and at high excitation energy (E x =60 MeV). In particular, a narrow resonance with J=36 at E x =60 MeV [10,11] was observed. The resonance spin is higher than the grazing angular momentum in the entrance channel (L graz = 32 ) by 4 , raising many questions on this subject.…”

Angular correlation, spin alignment, and systematics of mis-matched 12C+12C inelastic scattering resonances

“…Previous measurements [16][17][18] have demonstrated that such data can provide much new information about the mechanism of the inelastic scattering reaction, and can be used to deduce unambiguous spin assignments for heavy-ion resonances.…”

“…To determine the magnetic substate population parameters, we follow the method described in [16][17][18], and measure the angular distribution of the 4.443 MeV gamma rays emitted by the 12 C nucleus excited into its 2 + 1 state in coincidence with the alpha particles produced by the decay of the 12 C nucleus in its 0 + 2 level. The experiment was carried out with an array of four double-sided silicon strip detectors (DSSDs), coupled with the 4π gamma-ray detector GAMMASPHERE [19] while it was operated at Argonne National Laboratory.…”

“…In each case, the efficiencycorrected gamma-ray yields were integrated over the azimuthal gamma-ray angle to eliminate interference effects between magnetic substates [17]. For data analyzed in the beam-axis coordinate system, this integration was done simply by adding the yields from detectors with the same polar angle.…”