English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We are developing an Optical Readout Time Projection Chamber (O-TPC) detectorfor the study of the 12C(a,g)16O reaction that determines the ratio of carbonto oxygen in helium burning. This ratio is crucial for understanding the finalfate of a progenitor star and the nucleosynthesis of elements prior to a TypeII supernova; an oxygen rich star is predicted to collapse to a black hole, anda carbon rich star to a neutron star. Type Ia supernovae (SNeIa) are used asstandard candles for measuring cosmological distances with the use of anempirical light curve-luminosity stretching factor. It is essential tounderstand helium burning that yields the carbon/oxygen white dwarf and thusthe initial stage of SNeIa. The O-TPC is intended for use with high intensityphoton beams extracted from the HIgS/TUNL facility at Duke University to studythe 16O(g,a)12C reaction, and thus the direct reaction at energies as low as0.7 MeV. We are conducting a systematical study of the best oxygen containinggas with light emitting admixture(s) for use in such an O-TPC. Preliminaryresults with CO_2 + TEA mixture were obtainedComment: Proceedings 21st Winter Workshop on Nuclear Dynamics, Breckenridge,  CO, February 5-12, 2005. Work Supported by USDOE Grant No. DE-FG02-94ER40870  and the Yale-Weizmann Collaboration, American Committe on Weizmann Institute  of Scienc

Optical Readout Time Projection Chamber (O-TPC) for a Study of Oxygen Formation in Stellar Helium Burning