proton emission from deformed rare earth nuclei
DESCRIPTION
Proton emission from deformed rare earth nuclei. Robert Page. AREA. µ. t. e. 1. /. 2. Simple model for spherical proton emitters. Proton decay of 160 Re. Q p = 1271 keV. Proton emission as a spectroscopic tool. 160 Re Half-life (ms) E p ( keV ) d 3/2 h 11/2 Expt - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/1.jpg)
Proton emission from deformed rare earth nuclei
Robert Page
![Page 2: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/2.jpg)
Simple model for spherical proton emitters
pprotonp S1A
AEQ
Proton decay of 160Re
Qp = 1271 keV
AREA2/1 et
![Page 3: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/3.jpg)
160Re Half-life (ms)
Ep (keV) d3/2 h11/2 Expt
1263 0.24 480 0.67
h11/2
d3/2)(t
)calc(tS
2/1
2/1
expt
Proton emission as a spectroscopic tool
![Page 4: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/4.jpg)
Deformed proton emitters
P.J. Woods et al., PRC69 (2004) 051302
135Tb
![Page 5: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/5.jpg)
Known Proton Emitters
B. Blank & M.J.G. Borge, Progress in Particle and Nuclear Physics 60 (2008) 403
![Page 6: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/6.jpg)
Known Proton Emitters
B. Blank & M.J.G. Borge, Progress in Particle and Nuclear Physics 60 (2008) 403
SelectivityYield
Why are there so few knownproton emitters in this region?
![Page 7: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/7.jpg)
Implantation – proton – alpha correlation
Decay Particle Energy (MeV)
Coun
ts (
106 )
/ 10
keV
![Page 8: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/8.jpg)
Coun
ts /
10
keV
Decay Particle Energy (MeV)
t1/2 = 21 s
The proton emitter 159Re
D.T. Joss et al., Physics Letters B641 (2006) 34
![Page 9: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/9.jpg)
Implantation – proton correlations
P.J. Woods et al., PRC69 (2004) 051302
50Cr + 92Mo → 135Tb + p6n
Argonne FMA
A = 135 only
60 m thick DSSD
![Page 10: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/10.jpg)
Beta-decay half-lives
Moller, Nix & Kratz, Atomic Data & Nuclear Data Tables 66 (1997) 131
![Page 11: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/11.jpg)
Proton-decay half-lives
![Page 12: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/12.jpg)
Fusion-evaporation reactions
Compound nuclei
![Page 13: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/13.jpg)
Fusion-evaporation pxn reactions
30 b
3 nb
![Page 14: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/14.jpg)
(Super-)FRS A & Z separation
Isomer decays or known pfor unique A & Z identification
AIDA
Selectivity
![Page 15: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/15.jpg)
Predicted Super FRS Yields @ 1012/s
Neutron number N
Atom
ic n
umbe
r Z
= 3.6 / hour= 0.6 / week
Yield
![Page 16: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/16.jpg)
Predicted Super FRS Yields @ 1012/s
Neutron number N
Atom
ic n
umbe
r Z
= 3.6 / hour= 0.6 / week
Yield
![Page 17: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/17.jpg)
Some physics opportunities
• New proton emitters• Weak proton-decay branches• Proton-decay fine structure• Precision measurements• Beta-delayed gamma spectroscopy
![Page 18: Proton emission from deformed rare earth nuclei](https://reader035.vdocuments.us/reader035/viewer/2022062518/56814073550346895dabf2aa/html5/thumbnails/18.jpg)
Outstanding questions
• Background from and p decays(1 mm thick DSSDs cf. 60 m)
• Identify best physics cases• Choose best primary beam
Your input is welcome...
Robert Page