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Journal Articles

Super-absorbent polymer valves and colorimetric chemistries for time-sequenced discrete sampling and chloride analysis of sweat via skin-mounted soft microfluidics

Kim, S. B.*; Zhang, Y.*; Won, S. M.*; Bandodkar, A. J.*; Sekine, Yurina; Xue, Y.*; Koo, J.*; Harshman, S. W.*; Martin, J. A.*; Park, J. M.*; et al.

Small, 14(12), p.1703334_1 - 1703334_11, 2018/03

 Times Cited Count:47 Percentile:94.29(Chemistry, Multidisciplinary)

Journal Articles

Identification of deformed intruder states in semi-magic $$^{70}$$Ni

Chiara, C. J.*; Weisshaar, D.*; Janssens, R. V. F.*; Tsunoda, Yusuke*; Otsuka, Takaharu*; Harker, J. L.*; Walters, W. B.*; Recchia, F.*; Albers, M.*; Alcorta, M.*; et al.

Physical Review C, 91(4), p.044309_1 - 044309_10, 2015/04

 Times Cited Count:30 Percentile:90.56(Physics, Nuclear)

The neutron-rich isotope $$^{70}$$Ni was produced by multi-nucleon transfer reactions of $$^{70}$$Zn in the Argonne National Laboratory, and an in-beam $$gamma$$-ray experiment were performed using the GRETINA array. The $$2^+_2$$ and $$4^+_2$$ levels of $$^{70}$$Ni were observed for the first time. Those levels are regarded as large deformed states associated with proton excitation from the $$f_{7/2}$$ orbit because they cannot be reproduced by a shell-model calculation assuming a small valence space without $$f_{7/2}$$. A theoretical analysis based on the Monte Carlo shell model published in 2014 indicates that those levels corresponds to a prolate deformed band. The present result demonstrates the occurrence of shape coexistence in neutron-rich Ni isotopes other than a known case of $$^{68}$$Ni, and confirms the predictive power of the Monte Carlo shell-model calculation.

Oral presentation

Nuclear moments of the radioactive isotope $$^{131}$$La determined by collinear fast-beam laser spectroscopy

Iimura, Hideki; Schuessler, H. A.*; Buchinger, F.*; Cocolios, T.*; Crawford, J. E.*; Gulick, S.*; Lee, J. K. P.*; Levy, C. D. P.*; Pearson, M.*; Lioubimov, V.*; et al.

no journal, , 

We report measurements of the hyperfine structure constants of $$^{131}$$La (N=74) as an initial step to further exploring the neutron deficient rare-earth region where a sudden onset of nuclear deformation is predicted theoretically around N=74. This work is an extension of our earlier off-line experiments on $$^{135,137-139}$$La to on-line laser spectroscopy. The radioactive isotope $$^{131}$$La (T$$_{1/2}$$=59 min) was produced by means of a spallation reaction using a proton beam from TRIUMF cyclotron. The hyperfine spectra were observed by using the method of collinear fast-beam laser spectroscopy. From the obtained hyperfine constants, the nuclear moments of $$^{131}$$La were derived. In order to arrive at an understanding of the nuclear structure of $$^{131}$$La, we have carried out particle triaxial-rotor calculations. The results from the calculation reproduce well the experimental values when a triaxial shape is assumed for $$^{131}$$La.

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