Search

The spectrum of $\rm^{10}He$was studied by means of the $\rm^{3}H(^{8}He, p)^{10}He$reaction at a laboratory energy of 25 $\rm MeV/A$and small center-of-mass angles. Missing mass spectrum of $\rm ^{10}He$was derived from the obtained p-8He coincidence. A resolution of 0.7 MeV was achieved in this spectrum for the measured $\rm ^{10}He$energy. Most likely, a well isolated group of 10 events detected between 2 and 5 MeV and showing a maximum at about 3 MeV in the spectrum of the present work exhibits the $\rm ^{10}He$g.s. resonance.

Abstract: The spectrum of 10He was studied by means of the 3H(8He, p)10He reaction at a laboratory energy of 25 MeV/A and small center-of-mass angles. Missing mass spectrum of 10He was derived from the obtained p-8He coincidence. A resolution of 0.7 MeV was achieved in this spectrum for the measured 10He energy. Most likely, a well isolated group of 10 events detected between 2 and 5 MeV and showing a maximum at about 3 MeV in the spectrum of the present work exhibits the 10He g.s. resonance.

The spectrum of 10He was studied by means of the 3H(8He, p)10He reaction at a laboratory energy of 25?MeV/A and small center-of-mass angles. Missing mass spectrum of 10He was derived from the obtained p-8He coincidence. A resolution of 0.7?MeV was achieved in this spectrum for the measured 10He energy. Most likely, a well isolated group of 10 events detected between 2 and 5?MeV and showing a maximum at about 3?MeV in the spectrum of the present work exhibits the 10He g.s. resonance.

We have studied the fragmentation of Au projectiles interacting with targets of C, Al and Cu at an incident energy ofE/A=600 MeV. The employed inverse kinematics allowed a nearly complete detection of projectile fragments with chargeZ?2. The recorded fragmentation events were sorted according to three observables, the multiplicityMlp of light charged particles, the largest atomic numberZmax within an event, and a new observable,Zbound, representing the sum of the atomic numbersZ of all fragments withZ?2. Using these observables, the impact parameter dependence of the fragmentation process was investigated. For all three targets, a maximum mean multiplicity of 3 to 4 intermediate mass fragments (IMFs) is observed. The corresponding impact parameters range from central collisions for theC target to increasingly peripheral collisions for the heavier targets. It is found that the correlation between the IMF multiplicity andZbound, extending from evaporation type processes (largeZbound) to the total disassembly of the projectile (smallZbound), is independent of the target nucleus. This universal behaviour may suggest an — at least partial — equilibration of the projectile fragment prior to its decay.

Elastic and inelastic scattering as well as transfer transitions involving a valence proton in thesd- andfp- shell orbits are studied in the interaction of37Cl +36S at ECM=50 MeV. Experimental angular distributions of single particle states of37Cl (elastic and inelastic transfer) are presented with a CRC analysis. In the CRC calculations the effects of inelastic and transfer couplings are studied using known spectroscopic information. In the CRC analysis six single particle bound states and the collective 2+ excitation of36S are included in the coupling scheme. Higher order coupling effects are found to be important. A distinct effect, the mixing of single particle states (of different parity) due to direct and transfer interactions is observed to produce an enhancement of the transfer cross section to the low lying states. This feature is due to a change of the asymptotically defined single nucleon orbits via polarization in the field of the other nucleus, an effect which is analogous to hybridization, known from atomic physics.