# nitrogen gas execution

Self-seeded lasing in ionized air pumped by 800 nm femtosecond laser pulses » Abstract: We report on the lasing in air and pure nitrogen gas pumped by a single 800 nm femtosecond laser pulse. Depending on gas pressure, incident laser power and beam convergence, different lasing lines are observed in the forward direction with rapid change of their relative intensities. The lines are attributed to transitions between vibrational and rotational levels of the first negative band of the singly charged nitrogen molecule-ion. We show that self-seeding plays an important role in the observed intensity changes. Opg.optica.org

Authorized Methods by State » The Death Penalty Information Center is a non-profit organization serving the media and the public with analysis and information about capital punishment.… Deathpenaltyinfo.org

Enhanced Coherent Emission from Ionized Nitrogen Molecules by Femtosecond Laser Pulses » The forward emission spectra were experimentally measured for ionized nitrogen molecules by an 800 nm pump laser and a delayed seed laser. It was found that emission lines around both 428 and 391 nm are greatly enhanced upon use of a 391 or 428 nm seed laser. The emission lines around 391 and 428 nm can be assigned to the rotational transitions of N2+ [B2Σu+(v′ = 0) → X2Σg+(v = 0)] and N2+ [B2Σu+(v′ = 0) → X2Σg+(v = 1)], respectively. They originate from seed-induced superfluorescence and resonant stimulated Raman scattering. The genetic algorithm was utilized to simulate the experimental observations and determine the relative population of B2Σu+(v′ = 0), X2Σg+(v = 1), and X2Σg+(v = 0). The result verifies that vibrational population inversion is achieved between B2Σu+(v′ = 0) and X2Σg+(v = 0) by the 800 nm pump laser. Our finding provides new insights into controlling the coherent emission of ionized nitrogen molecules, which has promising application in filamentation-based remote atmos Pubs.acs.org

An eyewitness account of what happened at the nation's 1st nitrogen gas execution » As witnesses watched through a window, Kenneth Eugene Smith, who was convicted and sentenced to die in the 1988 murder-for hire slaying of Elizabeth Sennett, convulsed on a gurney as Alabama carried out the nation's first execution using nitrogen gas. Pbs.org

Alabama man shook violently on gurney during first-ever nitrogen gas execution » ATMORE, Ala. (AP) — A man put to death using nitrogen gas shook and convulsed for minutes on the gurney as Alabama carried out the first-of-its-kind execution that has ignited debate over the human… Krqe.com

Alabama executes a man with nitrogen gas, the first time the new method has been used » ATMORE, Ala. (AP) — Alabama executed a convicted murderer with nitrogen gas Thursday, putting him to death with a first-of-its-kind method that once again placed the U.S. at the forefront of the de… Krqe.com

First U.S. execution by nitrogen gas would cause "painful and humiliating death," U.N. experts warn » Experts have denounced Alabama's planned execution of a death row inmate by nitrogen hypoxia — an untested suffocation method that they say could cause "grave suffering." Cbsnews.com

What happened at the nation’s first nitrogen gas execution: An AP eyewitness account » ATMORE, Ala. (AP) — As witnesses including five news reporters watched through a window, Kenneth Eugene Smith, who was convicted and sentenced to die in the 1988 murder-for hire slaying of Elizabet… Krqe.com