Proton Polarization Angular Distribution in Deuteron Photo-Disintegration

Technical Report · Wed Dec 01 00:00:00 EST 1999

DOI:https://doi.org/10.2172/954613· OSTI ID:954613

Sarty, Adam; Fox, Brendan; Meekins, David; Margaziotis, Demetrius; Kinney, Edward; Garibaldi, Franco; Gao, Juncai; Aniol, Konrad; Epstein, Martin; Amaryan, Moscov; Amaryan, Moskov; Markowitz, Pete; Bosted, Peter; Roche, Rikki; Gilman, Ronald; Frullani, Salvatore; Churchwell, Steve

The apparent scaling in 90 cm deuteron photodisintegration, first observed several years ago at SLAC, has lead to several related experiments and a number ot theoretical calculations.We have in the past year measured in Hall A, with up to 2.5-GeV photons, cross sections at large angles and the proton polarization at 90cm.Verypreliminary online analysis of the induced polarizations yields the very surprising result that theinduced polarizations apparently vanish starting at about the same energy at whichthe existing cross section data start to scale, to follow the constituent countingrules.Given this result, we propose further measurements to see if this observationholds at other angles.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 954613
• Report Number(s): JLAB-PR-00-007; TRN: US201014%%1189
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ANGULAR DISTRIBUTION
CROSS SECTIONS
DEUTERONS
PHOTONS
PHOTONUCLEAR REACTIONS
POLARIZATION
PROTONS
STANFORD LINEAR ACCELERATOR CENTER