@article {upadhyay2016longitudinal, title = {Longitudinal spin relaxation of optically pumped rubidium atoms in solid parahydrogen}, journal = {Physical review letters}, volume = {117}, number = {17}, year = {2016}, pages = {175301}, publisher = {APS}, author = {Upadhyay, Sunil and Kanagin, Andrew N and Hartzell, Chase and Christy, Tim and Arnott, W Patrick and Momose, Takamasa and Patterson, David and Weinstein, Jonathan D} }