Betty, Suwat, Mike, Rachel, Bec, Jack, Dan–arrived when Bec began.
Bill: out of town
Zibi: sick
Group Business/Physics
Congratulations, Bill!
Room 124: Removed cabinets, tiles in floor have asbestos. Will be drilling into the floor, so need to remove asbestos from the floor. Pushes back all lab moving?
Lee's experiment: maybe he'll decide not to take out DE's
Betty has a summer student coming mid-May. Think about having him do a pin source calibration on Tilak's experiment
HiRA cans: Jimmy assembled one, Rachel and Betty looked at it; he'll try to set in the Si mechanical sample in the next one to check that it's right
TPC visitors here this weekend! Bec has a schedule up.
Bec: TWOFNR vs. fresco: corrections to how fresco input files read, new form for local-energy approximation, Now predictions between TWOFNR and fresco almost exact
Previously saw “discontinuity” in 3He cross-section, only in TWOFNR, corrected. Had a dominating spin-orbit term above ~70 MeV
Jack: Efficiency
“spreader function” in analysis code: where does it happen? Current guess: after merge when making physics files
Will ask Ali when he incorporated it
make randomization an option in the efficiency program, or a separate script to do it and then can be read by the efficiency program.
Research Updates
Mike: new gates on p,d,t from 50 MeV data. Not cutting into bands!
Rachel: dropping 3He because not enough dynamic range in the LASSAs. Looking at each CsI crystal, am missing some triton punchthrough, also have a lot of punchback in telescope 5 spectra… hopefully this will be omitted in the center-of-mass data when take cuts.
Dan: Proton vetoes not 100% efficient. Can we reconstruct missing events? In 50 MeV: have lots more protons that are wall overflows than neutrons. In 120 Mev: have way more overflow data than anything else.
Suwat: assembling from machine shop.. getting welded.
Betty: illustration: when using statistical models be careful of the assumptions that are made in the models. Also, be careful when using someone else's data, may not know all the limitations.