Science Scientists First Measure Arsenic-73 Proton Capture to Form Selenium-74 in Lab by Anika Shah - Technology April 19, 2026 by Anika Shah - Technology April 19, 2026 Scientists have for the first time measured how arsenic-73 captures a proton to grow selenium-74, a reaction long thought to occur only inside exploding stars. The measurement was made inside … 0 FacebookTwitterPinterestEmail