scholarly journals β-Delayed γ Emissions of 26P and Its Mirror Asymmetry

Symmetry ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2278
Author(s):  
Hao Jian ◽  
Yufeng Gao ◽  
Fanchao Dai ◽  
Jiajian Liu ◽  
Xinxing Xu ◽  
...  
Keyword(s):  
Nuclear Force ◽  
National Laboratory ◽  
Heavy Ion ◽  
Research Facility ◽  
Β Decay ◽  
Halo Structure ◽  
High Purity Germanium ◽  
Hpge Detectors ◽  
First Excited State ◽  
Γ Rays

The study of the origin of asymmetries in mirror β decay is extremely important to understand the fundamental nuclear force and the nuclear structure. The experiment was performed at the National Laboratory of Heavy Ion Research Facility in Lanzhou (HIRFL) to measure the β-delayed γ rays of 26P by silicon array and Clover-type high-purity Germanium (HPGe) detectors. Combining with results from the β decay of 26P and its mirror nucleus 26Na, the mirror asymmetry parameter δ ( ≡ft+/ft−− 1) was determined to be 46(13)% for the transition feeding the first excited state in the daughter nucleus. Our independent results support the conclusion that the large mirror asymmetry is close to the proton halo structure in 26P.

X-RAYS EMISSION OF HYDROGEN-LIKE AND HELIUM-LIKE ARGON IN INTERACTION WITH Mo METALLIC SURFACE

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2433-2437
Author(s):  
Z. H. YANG ◽  
X. M. CHEN ◽  
Y. P. ZHANG ◽  
A. X. ZHANG ◽  
Y. T. ZHAO ◽  
...  
Keyword(s):  
Electron Cyclotron Resonance ◽  
National Laboratory ◽  
Heavy Ion ◽  
Ion Source ◽  
Metallic Surface ◽  
X Rays ◽  
Research Facility ◽  
X Ray ◽  
First Time ◽  
Charged Ions

14-GHz electron cyclotron resonance ion source (ECRIS) at the Heavy Ion Research Facility National Laboratory in Lanzhou has been used to investigate the radiative deexcitation of highly charged Ar 17+ and Ar 16+ ions as they interact with a molybdenum surface. The interaction of Ar 17+ and Ar 16+ ions above Mo Metallic Surface has been studied by looking at the X-rays with a Si ( Li ) detector. ECRIS is used in our work for the first time. As the experimental results, the X-ray spectra of Ar 17+ and Ar 16+ ions interacting with a Mo metal target have been given. The capture of many electrons by Ar 17+ and Ar 16+ ions, at low velocities, near a metallic surface, has been studied. Hollow atoms produced in the interaction of highly charged ions with a Mo metallic surface have been observed.

Electron and ion irradiation-induced dissolution of mechanical twins in the intermetalic U3Si: An in situ HVEM study

1989 ◽  
Vol 47 ◽  
pp. 652-653
Author(s):  
Charles W. Allen ◽  
Robert C. Birtcher
Keyword(s):  
Elevated Temperatures ◽  
Ion Irradiation ◽  
Ion Beam ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Heavy Ion ◽  
High Energy ◽  
Mechanical Twinning ◽  
In Situ Experiments

The uranium silicides, including U3Si, are under study as candidate low enrichment nuclear fuels. Ion beam simulations of the in-reactor behavior of such materials are performed because a similar damage structure can be produced in hours by energetic heavy ions which requires years in actual reactor tests. This contribution treats one aspect of the microstructural behavior of U3Si under high energy electron irradiation and low dose energetic heavy ion irradiation and is based on in situ experiments, performed at the HVEM-Tandem User Facility at Argonne National Laboratory. This Facility interfaces a 2 MV Tandem ion accelerator and a 0.6 MV ion implanter to a 1.2 MeV AEI high voltage electron microscope, which allows a wide variety of in situ ion beam experiments to be performed with simultaneous irradiation and electron microscopy or diffraction.At elevated temperatures, U3Si exhibits the ordered AuCu3 structure. On cooling below 1058 K, the intermetallic transforms, evidently martensitically, to a body-centered tetragonal structure (alternatively, the structure may be described as face-centered tetragonal, which would be fcc except for a 1 pet tetragonal distortion). Mechanical twinning accompanies the transformation; however, diferences between electron diffraction patterns from twinned and non-twinned martensite plates could not be distinguished.

Introduction of the Heavy Ion Research Facility in Lanzhou (HIRFL)

2020 ◽  
Vol 15 (12) ◽  
pp. T12015-T12015
Author(s):  
L.J. Mao ◽  
J.C. Yang ◽  
W.Q. Yang ◽  
J.W. Xia ◽  
Y.J. Yuan ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Research Facility

scholarly journals The high current experiment: First results

2002 ◽  
Vol 20 (3) ◽  
pp. 435-440 ◽  
Author(s):  
P.A. SEIDL ◽  
D. BACA ◽  
F.M. BIENIOSEK ◽  
A. FALTENS ◽  
S.M. LUND ◽  
...  
Keyword(s):  
Space Charge ◽  
Ion Beam ◽  
Beam Steering ◽  
Fusion Energy ◽  
National Laboratory ◽  
Heavy Ion ◽  
High Current ◽  
Current Experiment ◽  
First Results ◽  
High Space

The High Current Experiment (HCX) is being assembled at Lawrence Berkeley National Laboratory as part of the U.S. program to explore heavy ion beam transport at a scale representative of the low-energy end of an induction linac driver for fusion energy production. The primary mission of this experiment is to investigate aperture fill factors acceptable for the transport of space-charge dominated heavy ion beams at high space-charge intensity (line-charge density ∼ 0.2 μC/m) over long pulse durations (>4 μs). This machine will test transport issues at a driver-relevant scale resulting from nonlinear space-charge effects and collective modes, beam centroid alignment and beam steering, matching, image charges, halo, lost-particle induced electron effects, and longitudinal bunch control. We present the first experimental results carried out with the coasting K+ ion beam transported through the first 10 electrostatic transport quadrupoles and associated diagnostics. Later phases of the experiment will include more electrostatic lattice periods to allow more sensitive tests of emittance growth, and also magnetic quadrupoles to explore similar issues in magnetic channels with a full driver scale beam.

scholarly journals Coupled Operation Experience at the Holifield Heavy Ion Research Facility

1983 ◽  
Vol 30 (4) ◽  
pp. 2077-2079 ◽  
Author(s):  
R. S. Lord ◽  
J. B. Ball ◽  
E. D. Hudson ◽  
P. K. Kloeppel ◽  
C. A. Ludemann ◽  
...  
Keyword(s):  
Heavy Ion ◽  
Research Facility

Investigation of parity mixing in 203Tl by measurement of the forward-backward asymmetry of γ-rays after β-decay

1976 ◽  
Vol 265 (3) ◽  
pp. 493-510 ◽  
Author(s):  
F. Dydak ◽  
H.D. Polaschegg ◽  
P. Riehs ◽  
G. Serentschy ◽  
P. Weinzierl
Keyword(s):  
Β Decay ◽  
Γ Rays

LOW-SPIN STATES OF 76Se EXCITED IN 76Br(β++EC)76Se DECAY

2004 ◽  
Vol 13 (05) ◽  
pp. 933-947
Author(s):  
YAN LI ◽  
SHUIFA SHEN ◽  
WENDA HUANG ◽  
SHUANGHUI SHI ◽  
JIAHUI GU ◽  
...  
Keyword(s):  
High Resolution ◽  
Energy Levels ◽  
Spin States ◽  
Hpge Detectors ◽  
New Energy ◽  
Coincidence Mode ◽  
Γ Rays ◽  
First Time

The decay of bromine-76 was studied using high resolution HpGe detectors in singles and coincidence mode. Bromine-76 was produced via two reactions: 75 As (α,3 n )76 Br and 76 Se ( p , n )76 Br . The results of these experiments verified the previously reported levels of 76 Se . In addition to the previously described transitions and levels, 37 new γ-rays and 15 new energy levels were found for the first time.

scholarly journals Latest Results from RHIC + Progress on Determining q ^ L in RHI Collisions Using Di-Hadron Correlations

Universe ◽  
2019 ◽  
Vol 5 (6) ◽  
pp. 140
Author(s):  
Michael J. Tannenbaum
Keyword(s):  
National Laboratory ◽  
Heavy Ion ◽  
Brookhaven National Laboratory ◽  
Collider Physics ◽  
Relativistic Heavy Ion Collider ◽  
The Future

Results from Relativistic Heavy Ion Collider Physics in 2018 and plans for the future at Brookhaven National Laboratory are presented.

scholarly journals In Situ TEM Observations of Heavy Ion Damage in Gallium Arsenide

1988 ◽  
Vol 100 ◽  
Author(s):  
M. W. Bench ◽  
I. M. Robertson ◽  
M. A. Kirk
Keyword(s):  
Low Temperature ◽  
Room Temperature ◽  
National Laboratory ◽  
Argonne National Laboratory ◽  
Heavy Ion ◽  
In Situ Tem ◽  
Accelerator Facility ◽  
Transmission Electron ◽  
Ion Accelerator

ABSTRACTTransmission electron microscopy experiments have been performed to investigate the lattice damage created by heavy-ion bombardments in GaAs. These experiments have been performed in situ by using the HVEN - Ion Accelerator Facility at Argonne National Laboratory. The ion bcorbardments (50 keV Ar+ and Kr+) and the microscopy have been carried out at temperatures rangrin from 30 to 300 K. Ion fluences ranged from 2 × 1011 to 5 × 1013 ions cm−2.Direct-inpact amorphization is observed to occur in both n-type and semi-insulating GaAs irradiated to low ion doses at 30 K and room temperature. The probability of forming a visible defect is higher for low temperature irradiations than for room temperature irradiations. The amorphous zones formed at low temperature are stable to temperatures above 250 K. Post implantation annealing is seen to occur at room temperature for all samples irradiated to low doses until eventually all visible damage disappears.

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