Nuclear structure studies at intermediate energies

This report discusses the following topics: Search for dibaryon resonances; analysis of {sup 208}Pb({pi}{sup {plus minus}},{pi}{sup {plus minus}}) data; analysis of {sup 206,207,208}Pb(p,p{prime}) data; study of transition nuclei by (p,p{prime}); search for recoil free {delta}-production; search for low lying magnetic states; proton nucleus scattering and swelling of nucleons; measurement of spin observables in {sup 28}Si(p,p{prime}); strength of tensor force in nuclei; global analysis of (p,p{prime}) reactions to high spin states in {sup 28}Si and {sup 58}Ni and density dependent modifications; MRS Setup and development; and development of coincidence studies with the MRS

Nuclear structure studies at intermediate energies

This report discusses the following topics: development of (p, 2p) coincidence studies at MRS; analysis of {sup 206, 207, 208}Pb(p, p{prime}) data from E855; and computer program development

Crystallization-Induced Charge-Transfer Change in TiOPc Thin Films Revealed by Resonant Photoemission Spectroscopy

Organic semiconductors usually demonstrate crystal structure dependent electronic properties, and through precise control of film structure, the performance of novel organic electronic devices can be greatly improved. Understanding the crystal structure dependent charge-transfer mechanism thus becomes critical. In this work, we have prepared amorphous titanyl phthalocyanine films by vacuum molecular beam evaporation and have further crystallized them through vacuum annealing. In the crystalline phase, an excited electron is rapidly transferred into neighboring molecules; while in the amorphous phase, it is mainly localized and recombines with the core hole as revealed by resonant photoemission spectroscopy (RPES). The fast electron transfer time is determined to be around 16 fs in the crystalline film, which is in good agreement with the charge-transfer hopping time estimated from the best device performance reported. The crystallized film shows more p-type characteristics than the amorphous with all the energy levels shifting toward the vacuum level. However, the greatly improved charge transfer is assigned to the molecular orbital coupling rather than this shift. From density functional theory and RPES, we specify the contribution of two differently coordinated nitrogen atoms (N2c and N3c) to the experimental results and illustrate that the N3c related orbital has experienced a dramatic change, which is keenly related to the improved charge transfer