'187 os' presentation slideshows

Nuclear physics aspects of neutron capture and ?-decay rates in stellar environment

Nuclear physics aspects of neutron capture and ?-decay rates in stellar environment. A Mengoni ENEA and INFN Bologna. PANDORA meeting, 31 January 2019, Bologna. s-process nucleosynthesis. BANG!. ?. 4.6 Ga. Now. s-only. Os. Os 184 0.02. Os 185 94 d. Os 186

292 views • 29 slides

N eutron reactions & nuclear cosmo-chronology

N eutron reactions & nuclear cosmo-chronology. Re/Os clock how does it work? recent experimental improvements preliminary results. M. Mosconi, A. Mengoni, M. Heil, F. K. and the n _TOF collaboration. Cosmic A ges.

374 views • 28 slides

J. H. Kelley, NC State U. and Triangle Universities Nuclear Laboratories (TUNL),

The Astrophysical 187 Re/ 187 Os Ratio: First Direct Measurement of the 187 Re(n, 2n ? ) 186m Re Destruction Cross Section. J. H. Kelley, NC State U. and Triangle Universities Nuclear Laboratories (TUNL), D.B. Masters, Samford University (TUNL REU),

362 views • 25 slides

Re-Os ? Pt-Os ???????

249 views • 24 slides

n_TOF04: 186 Os, 187 Os, 188 Os capture cross sections

n_TOF04: 186 Os, 187 Os, 188 Os capture cross sections. Measured on August 2003 for a total of 2.3e18 protons. Neutron flux monitor : 6 Li/silicon detector ? -ray detection: C 6 D 6 scintillators (PHWT). MACS at 25 keV fundamental for the determination of the Re/Os cosmochronometer.

342 views • 20 slides

Kaori Fujii (INFN Trieste)

342 views • 17 slides

HSDP Drill Site

HSDP Drill Site. HSDP - a detailed look at the Hawaiian plume (and CMB?). (Sharp et al., 2004). center. Melting region. edge. Sampling issues: Pt. 1. EPR MORB range. r = 30 km. r = 130 km. MORB. MORB. The isotopic stratigraphy at the base of the mantle is not simple. Sr. He.

511 views • 16 slides

Re/Os cosmochronometer: measurements of relevant Os cross sections

259 views • 15 slides

Experimental Setup

ObservedChannel181Hf180Hf(n,?)181Hf180mHf180Hf(n,n')180mHf179m2Hf180Hf(n,2n)179m2Hf179Hf(n,n')179m2Hf175Hf176Hf(n,2n)175Hf173Hf174Hf(n,2n)173Hf. 2 H(d,n) 3 He. I d =1 m A. beam pickoff. 7.8 atm. Experimental Setup. 187Re(n,2n)186Re. 11.4. 11.38. 11.36. y = -0.0076x + 11.384. 11.34.

179 views • 1 slides