I NSTITUTE FOR S TRUCTURE AND N UCLEAR A STROPHYSICS
N UCLEAR S CIENCE LABORATORY
Michael Wiescher
Research:
Achievements:
Goals:
Stellar Burning – nuclear reactions with stable beams
Explosive Burning – nuclear studies beyond stability
Neutrino Sources,
(Wiescher)
Solar System characteristics
(Collon)
Galactic Radioactivities,
(Collon, Wiescher)
rp- and αp Processes,
(Aprahamian, Wiescher)
r- & p-Processes
(Aprahamian, Wiescher)
Neutron Sources
(Couder, Wiescher)
Helium & Carbon burning
(Couder, Wiescher)
Nova burning with SSNAP
(Bardayan)
rp- & αp Process with SSNAP & ANASEN (Bardayan, Wiescher
r-process nuclei with traps
(Aprahamian, Brodeur)
ARUNA Meeting- June 12, 2014
I NSTITUTE FOR S TRUCTURE AND N UCLEAR A STROPHYSICS
N UCLEAR S CIENCE LABORATORY
Achievements 2008-2013
• Mapping the CNO cycle as solar neutrino source
12C(p,)13N, 14N(p,)15O, 15N(p,)16O, 17O(p,)18F
• Investigating pp-chain neutrino sources
3He(α,)7Be
• Closing in on neutron sources
22Ne(α,n)
(via 26Mg(,’), 26Mg(α,α’), 22Ne(6Li,d) studies); 12C(12C,n)23Mg
• Solar System Radioactivity & Chronology
146Sm
half life, 33S(α,p)36Cl
• The origins of Galactic Radioactivities
40Ca(α,)44Ti, 60Fe(n,)61Fe, 60Fe(,n)59Fe;
first attempts of 60Fe life-time measurements
• Mapping the p-process
proton and alpha radiative capture on neutron deficient medium mass isotopes
• Extensive modeling work in nuclear reaction cross sections
(AZURE, SAPPHIRE, CIGAR)
ARUNA Meeting- June 12, 2014
I NSTITUTE FOR S TRUCTURE AND N UCLEAR A STROPHYSICS
N UCLEAR S CIENCE LABORATORY
Experimental complementarity with
forward and inverse kinematics
Light ion on heavy target with
measurement of light reaction
products, limited by solid angle
and detection efficiency.
Heavy ion on light target with
measurement of heavy ion recoil
yield, limited by initial beam intensity
and acceptance of recoil separator
ARUNA Meeting- June 12, 2014
I NSTITUTE FOR S TRUCTURE AND N UCLEAR A STROPHYSICS
N UCLEAR S CIENCE LABORATORY
Projects for 2014-2017
• 4He(3He,7Be) at St. GEORGE
• 4He(14N,18F)
calibration studies
• 4He(22Ne,26Mg)
• 4He(22Ne,25Mg)n and at CASPAR
• 4He(12C,16O) proposed experiments
•
12C+12C
•
60Fe
with SAND detector array
live time measurement with AMS
and other experiments
ARUNA Meeting- June 12, 2014
I NSTITUTE FOR S TRUCTURE AND N UCLEAR A STROPHYSICS
N UCLEAR S CIENCE LABORATORY
Solar Neutrino Sources
12C(p,)13N
Theorist spectrum
3He(α,)7Be
14N(p,)15O
17O(p,)18F
New experimental data over wide energy
range from ND & LUNA experiments,
extrapolated by JINA R-matrix code AZURE
Antonios Kontos, PhD 2012; Qian Li, PhD 2014
NSF
ARUNA
Site Visit
Meeting- February
June 12,
11,2014
2014
BOREXINO spectrum:
Reduction of 11C background
will be necessary!
I NSTITUTE FOR S TRUCTURE AND N UCLEAR A STROPHYSICS
N UCLEAR S CIENCE LABORATORY
Future Goals in He burning
13C(α,n)
with UMich detector & 22Ne(α,n) with St. GEORGE & CASPAR
R-matrix (AZURE) preparation
for 12C(α,)16O experiments!
ARUNA Meeting- June 12, 2014
I NSTITUTE FOR S TRUCTURE AND N UCLEAR A STROPHYSICS
N UCLEAR S CIENCE LABORATORY
New Equipment for new Initiatives
Superconducting Solenoid for
Nuclear Astrophysics: SSNAP
New injection magnet for
the FN ion source upgrade
To maximize the use of TWINSOL for the
study of transfer reactions for quiescent
and explosive stellar burning scenarios via
the use of inflight radioactive beams and
a new helical spectrometer (Bardayan).
The upgrade of the injection system
will achieve higher mass resolution
for AMS of high Z isotopes; that is
important for 60Fe life time analysis,
p-process studies, and several other
applications (Collon).
ARUNA Meeting- June 12, 2014