{"product_id":"splitterra-cockcroft-walton","title":"Splitterra – Splitting the Atom \/ p + Li → 2α Physics Sticker","description":"\u003cp\u003eSplitterra, a shirt-sleeved accelerator builder, holds a burst of orange fire between his hands.\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eIn April 1932 at the Cavendish Laboratory, John Cockcroft and Ernest Walton fired protons from a high-voltage accelerator at lithium. Scintillation screens flashed with pairs of alpha particles flying apart (Proc. R. Soc. A 137, 229, 1932). It was the first nucleus split by artificially accelerated particles, and the energy released matched E = mc².\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ep + ⁷Li → 2α + 17.3 MeV\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ep: proton\u003c\/li\u003e\n\u003cli\u003e⁷Li: lithium-7 nucleus\u003c\/li\u003e\n\u003cli\u003eα: alpha particle, a helium-4 nucleus\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTheir voltage multiplier needed only a few hundred kilovolts, because quantum tunnelling lets protons through the Coulomb barrier. They shared the 1951 Nobel Prize.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eHonest caveat:\u003c\/em\u003e The 17.3 MeV is shared between the two alphas; the line on the sticker omits it.\u003c\/p\u003e\u003ch3\u003eOn the sticker\u003c\/h3\u003e\u003cp\u003eSplitterra holds a bright orange burst of energy between his hands. Printed text: \u003cstrong\u003eSPLITTERRA\u003c\/strong\u003e with the line \u003cstrong\u003ep + Li → 2α\u003c\/strong\u003e. Pixel-art kiss-cut vinyl sticker, white, in 2″, 3″, 4″ and 6″ sizes.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"2\" × 2\" \/ White","offer_id":50964267466855,"sku":"12289368008829811174","price":4.99,"currency_code":"USD","in_stock":true},{"title":"3\" × 3\" \/ White","offer_id":50964267499623,"sku":"74648158812704095337","price":6.99,"currency_code":"USD","in_stock":true},{"title":"4\" × 4\" \/ White","offer_id":50964267532391,"sku":"15038281440517422637","price":8.99,"currency_code":"USD","in_stock":true},{"title":"6\" × 6\" \/ White","offer_id":50964267565159,"sku":"28972102432184728152","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/7613725590172090733_1200.jpg?v=1793663627","url":"https:\/\/pixelatedphysics.com\/id\/products\/splitterra-cockcroft-walton","provider":"Pixelated Physics","version":"1.0","type":"link"}