NASA's Deep Impact mission used several instruments to measure the impact depth created by the collision between its impactor and the comet Tempel 1. X-rays were not one of the methods employed. Instead, the mission primarily relied on visible light and infrared observations. Visible light images were captured by a camera onboard the Deep Impact spacecraft, providing detailed information about the impact crater's size and morphology. Infrared measurements were obtained through the use of spectrometers, which analyzed the thermal radiation emitted by the impact site to determine its temperature and depth. Additionally, the mission utilized radio science techniques to measure how the comet's gravitational field was affected by the impact, providing insights into the structural changes caused by the collision.