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AstroBox: Novel Proton Detection System from β-delayed p-Decay

Explore the innovative AstroBox system for detecting very low-energy protons from β-delayed p-decay, vital in studies like explosive H-burning in novae. The setup boasts improved detection efficiency, energy resolution, and lower beta background. Results show clear, sensitive data within hours. Presented by Alexandra Spiridon from the Cyclotron Institute, Texas A&M University.

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AstroBox: Novel Proton Detection System from β-delayed p-Decay

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  1. AstroBox - a new detection system for very low-energy protons from β-delayed p-decay Alexandra Spiridon Cyclotron Institute Texas A&M University

  2. Acknowledgements • Cyclotron Institute, Texas A&M University • L. Trache • E. Simmons • M. McCleskey • B.T. Roeder • R.E. Tribble • CEA Saclay • E. Pollacco • Marc Riallot • Jean PhilipeMols • MariamKebbiri • IKP Köln • G. Pascovici

  3. Decay spectroscopy Beta- and beta-delayed proton-decay Explosive H-burning in novae & IAS in Tz=-3/2 nuclei Isospin mixing GT strength distribution bottleneck r. in novae 31Cl→31S*  30P(p,g)31S* 22Na depletion in novae 23Al→23Mg*  22Na(p,g)23Mg*

  4. Experimental setup – ‘Before’

  5. 5/2+ 7/2+ IAS Lower beta background Better energy resolution

  6. New detection setup - AstroBox

  7. New detection setup - AstroBox

  8. 24Mg 45A MeV 23Al 40A MeV Purity: ~90% Intensity: ~ 4000 pps First time - very pure & intense 23Al Primary beam 24Mg @ 45A MeV – K500 Cycl Primary target LN2 cooled H2 gas p=2 atm Secondary beam 23Al @ 40.2A MeV

  9. Isotope separation - MARS

  10. Implantation procedure – ‘Now’

  11. Measurements

  12. Results – Detection efficiency

  13. AstroBox - Results betas 866 579 267 206 keV Can go to Ep~80 keV Good peak separation Very sensitive – clear results within just ~2 hrs of statistics

  14. Thank you for your attention!

  15. Implantation procedure – ‘Before’

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